Uruguay's Luis Suarez (9) is tackled by Senegal's Abdoulaye Ba, right, resulting in a red card for Ba, during a men's first-round group A soccer match at the 2012 Summer Olympics, Sunday, July 29, 2012, at Wembley Stadium in London. (AP Photo/Ben Curtis)

Stanislas Wawrinka of Switzerland returns to Andy Murray of Great Britain at the All England Lawn Tennis Club in Wimbledon, London at the 2012 Summer Olympics, Sunday, July 29, 2012. The roof was closed due to rain. (AP Photo/Elise Amendola)

Mihai Bobocica of Italy competes against Werner Schlager of Austria during the men's singles table tennis at the 2012 Summer Olympics, Sunday, July 29, 2012, in London. (AP Photo/Sergei Grits)

United States' William Priddy reaches for a ball during a men's preliminary volleyball match against Serbia at the 2012 Summer Olympics, Sunday, July 29, 2012, in London. (AP Photo/Jeff Roberson)

Canadian gymnast Victoria Moors performs on the uneven bars during the Artistic Gymnastic women's qualifications at the 2012 Summer Olympics, Sunday, July 29, 2012, in London. (AP Photo/Julie Jacobson)

Latvia's Martins Plavins goes for the ball out of bounds during a beach volleyball match at the 2012 Summer Olympics, Sunday, July 29, 2012, in London. (AP Photo/Dave Martin)

Fang Yuting of China shoots during the women's archery team competition at the 2012 Summer Olympics, Sunday, July 29, 2012, in London. (AP Photo/Marcio Jose Sanchez)

Fang Yuting of China shoots during the women's archery team competition at the 2012 Summer Olympics, Sunday, July 29, 2012, in London. (AP Photo/Marcio Jose Sanchez)

Japan's Yuki Otsu, left, vies for the ball with Morocco's Yassine Jebbour during their group D men's soccer match at St. James' Park, in Newcastle, England, during the London 2012 Summer Olympics, Sunday, July 29, 2012. (AP Photo/Scott Heppell)

Soeda Go of Japan serves to Marcos Baghdatis at the All England Lawn Tennis Club at Wimbledon, in London, at the 2012 Summer Olympics, Sunday, July 29, 2012. (AP Photo/Mark Humphrey)

Italy's Chiara Cainero shoots during the women's skeet final at the 2012 Summer Olympics, Sunday, July 29, 2012, in London. (AP Photo/Rebecca Blackwell)

Spain's Pau Gasol grabs a pass as he is shadowed by China's Yi Jianlian during a men's basketball game at the 2012 Summer Olympics, Sunday, July 29, 2012, in London. (AP Photo/Charles Krupa)

Thailand's Jongjit Maneepong, left, and Isara Bodin play against Ko Sung-hyun and Yoo Yeon-seong of South Korea during a men's singles badminton match at the 2012 Summer Olympics, Sunday, July 29, 2012, in London. (AP Photo/Andres Leighton)

Thailand's Isara Bodin, right, celebrates a point as his teammate Jongjit Maneepong looks on while playing against Ko Sung-hyun and Yoo Yeon-seong of South Korea during a men's singles badminton match at the 2012 Summer Olympics, Sunday, July 29, 2012, in London. (AP Photo/Andres Leighton)

Hungary goalkeeper Zoltan Szecsi reacts after making a save on a shot by Serbia in a preliminary water polo match at the 2012 Summer Olympics, Sunday, July 29, 2012, in London. Serbia won 14-10. (AP Photo/Julio Cortez)

Nishikori Kei of Japan returns a shot to Bernard Tomic at the All England Lawn Tennis Club at Wimbledon, in London, at the 2012 Summer Olympics, Sunday, July 29, 2012. (AP Photo/Mark Humphrey)

France's Tony Parker is stripped of the basketball by USA's James Harden, right, during the first half of a preliminary men's basketball game at the 2012 Summer Olympics, Friday, July 27, 2012, in London. (AP Photo/Eric Gay)

Tamas Kasas, top, of Hungary is pulled down by Dusko Pijetlovic of Sebia in a preliminary water polo match at the 2012 Summer Olympics, Sunday, July 29, 2012, in London. (AP Photo/Julio Cortez)

Yoshiaki Oiwa, of Japan, and his horse Noonday de Conde, compete in the equestrian eventing dressage phase at the 2012 Summer Olympics, Sunday, July 29, 2012, in London. (AP Photo/David Goldman)

Germany's Kay Matysik digs out a spike during a beach volleyball match against Latvia at the 2012 Summer Olympics, Sunday, July 29, 2012, in London. (AP Photo/Dave Martin)

Tamas Kasas, left, of Hungary defends against Filip Filipovic of Sebia in a preliminary water polo match at the 2012 Summer Olympics, Sunday, July 29, 2012, in London. (AP Photo/Julio Cortez)

US Silver medalists Abigail Johnston, front, and Kelci Bryant, rear, compete during the 3 Meter Synchronized Springboard final at the Aquatics Centre in the Olympic Park during the 2012 Summer Olympics in London, Sunday, July 29, 2012. (AP Photo/Michael Sohn)

during the women's 53-kg, group A, weightlifting competition at the 2012 Summer Olympics, Sunday, July 29, 2012, in London. (AP Photo/Hassan Ammar)

Gold medalists Wu Minxia, front, and He Zi, rear, compete during the 3 Meter Synchronized Springboard final at the Aquatics Centre in the Olympic Park during the 2012 Summer Olympics in London, Sunday, July 29, 2012. (AP Photo/Michael Sohn)

Turkey's Aylin Dasdelen reacts during the women's 53-kg, group A, weightlifting competition at the 2012 Summer Olympics, Sunday, July 29, 2012, in London. (AP Photo/Mike Groll)

Switzerland's Sabrina Jaquet follows the shuttlecock while playing against India's Saina Nehwal in a women's singles badminton match at the 2012 Summer Olympics, Sunday, July 29, 2012, in London. (AP Photo/Andres Leighton)

Kazakhstan's Gani Zhailauov, right, and Thailand's Ardee Saylom, fight during men's light 60-kg boxing at the 2012 Summer Olympics, Sunday, July 29, 2012, in London. (AP Photo/Ivan Sekretarev)

Maria Sharapova of Russia returns to Shahar Peer of Israel at the All England Lawn Tennis Club in Wimbledon, London at the 2012 Summer Olympics, Sunday, July 29, 2012. (AP Photo/Elise Amendola)

China's Yi Jianlian slams a dunk after getting past Spain's Marc Gasol, left, and Victor Sada, right, during a men's basketball game at the 2012 Summer Olympics, Sunday, July 29, 2012, in London. (AP Photo/Charles Krupa)

From left, China's Xu Jing, Cheng Ming and Fang Yuting celebrate a semifinal win over Russia during the women's archery team competition at the 2012 Summer Olympics, Sunday, July 29, 2012, in London. (AP Photo/Marcio Jose Sanchez)

Germany's Sara Goller strikes a graceful pose after chasing down a ball during a beach volleyball match against Australia at the 2012 Summer Olympics, Sunday, July 29, 2012, in London. (AP Photo/Dave Martin)

Jonas Hogh-Christensen of Denmark raises his fist to win the second race of the finn class during the London 2012 Summer Olympics, Sunday, July 29, 2012, in Weymouth and Portland, England. (AP Photo/Francois Mori)

Australia's Louise Bawden tries to kick the ball over the net digs in a match against Germany during a beach volleyball match at the 2012 Summer Olympics, Sunday, July 29, 2012, in London. (AP Photo/Dave Martin)

Sara Goller from Germany dives for a ball during the Beach Volleyball match against Australia at the 2012 Summer Olympics, Sunday, July 29, 2012, in London. (AP Photo/Petr David Josek)

U.S. gymnast Jordyn Wieber performs on the floor during the Artistic Gymnastics women's qualification at the 2012 Summer Olympics, Sunday, July 29, 2012, in London. (AP Photo/Gregory Bull)

Russia's Liubov Yaskevich waves to the crowd as she is introduced at the start of the final for women's 10-meter air pistol, at the 2012 Summer Olympics, Sunday, July 29, 2012, in London. (AP Photo/Rebecca Blackwell)

United States' James Harden, right, strips the ball from France's Tony Parker (9) during the first half of a preliminary men's basketball game at the 2012 Summer Olympics, Sunday, July 29, 2012, in London. (AP Photo/Eric Gay)

From left, Russia's Olga Zabelinskaya, the United State's Kristin Armstrong, Britain's Elizabeth Armitstead and the Netherlands' Marianne Vos compete in the women's cycling road race final at the 2012 Summer Olympics on Sunday, July 29, 2012, in London. (AP Photo/Stefano Rellandini, Pool)

Serbia men's water polo athletes celebrate a 14-10 victory over Hungary in a preliminary match at the 2012 Summer Olympics, Sunday, July 29, 2012, in London. (AP Photo/Julio Cortez)

German gymnast Oksana Chusovitina performs on the vault during the Artistic Gymnastic women's qualifications at the 2012 Summer Olympics, Sunday, July 29, 2012, in London. (AP Photo/Julie Jacobson)

Spain's Martin Montoya, right, vies for the ball with Honduras' Mario Martinez during their group D men's soccer match at St. James' Park, in Newcastle, England, during the London 2012 Summer Olympics, Sunday, July 29, 2012. (AP Photo/Scott Heppell)

Australia's Leisel Jones reacts after competing in the women's 100-meter breaststroke swimming semifinal at the Aquatics Centre in the Olympic Park during the 2012 Summer Olympics in London, Sunday, July 29, 2012. (AP Photo/Matt Slocum)

Annie Martin, right, and Marie-Andree Lessard, right, from Canada reach for a ball during the Beach Volleyball match against Great Britain at the 2012 Summer Olympics, Sunday, July 29, 2012, in London. (AP Photo/Petr David Josek)

Chinese gymnast Sui Lu performs on the floor during the Artistic Gymnastics women's qualification at the 2012 Summer Olympics, Sunday, July 29, 2012, in London. (AP Photo/Gregory Bull)

South Korea's Koo Ja-cheol, center, battles for the ball against Switzerland's Alain Wiss, right, during the group B men's soccer match between South Korea and Switzerland at the London 2012 Summer Olympics, in Coventry, England, Sunday, July 29, 2012. (AP Photo/Hussein Malla)

Egypt's gymnast Sherine Ahmed Elzeiny is carried by her coach after she sustained an injury during the Artistic Gymnastic women's qualifications at the 2012 Summer Olympics, Sunday, July 29, 2012, in London. (AP Photo/Julie Jacobson)

Japanese gymnast Rie Tanaka performs on the balance beam during the Artistic Gymnastic women's qualifications at the 2012 Summer Olympics, Sunday, July 29, 2012, in London. (AP Photo/Julie Jacobson)

Italy's Diego Occhiuzzi reacts after defeating Romania's Rares Dumitrescu, left, in a semifinal in the men's fencing individual sabre at the 2012 Summer Olympics, Sunday, July 29, 2012, in London.(AP Photo/Dmitry Lovetsky)

China's Wei Ning shoots during the women's skeet final at the 2012 Summer Olympics, Sunday, July 29, 2012, in London. Wei took silver in the event.(AP Photo/Rebecca Blackwell)

United States' Michael Phelps looks on after winning silver in the men's 4x100-meter freestyle relay final at the Aquatics Centre in the Olympic Park during the 2012 Summer Olympics in London, Sunday, July 29, 2012. (AP Photo/David J. Phillip)

April Ross of the United States serves during a beach volleyball match against Argentina at the 2012 Summer Olympics, Sunday, July 29, 2012, in London. (AP Photo/Dave Martin)

Malin Petersen, of Sweden, gestures as she enters the ring to cheers from the crowd before competing in the equestrian eventing dressage phase at the 2012 Summer Olympics, Sunday, July 29, 2012, in London. (AP Photo/David Goldman)

Valentin Hristov of Azerbaijan competes during the mens 56-kg, group A, weightlifting competition at the 2012 Summer Olympics, Sunday, July 29, 2012, in London. (AP Photo/Mike Groll)

Vietnam's Nguyen Tien Minh, plays against Belgium's Yuhan Tan, unseen, at a men's singles badminton match of the 2012 Summer Olympics, Sunday, July 29, 2012, in London. (AP Photo/Saurabh Das)

Germany's Hannes Aigner competes in the men's K-1 kayak slalom heats at the Lee Valley White Water Center at the 2012 Summer Olympics, Sunday, July 29, 2012, in London. (AP Photo/Victor R. Caivano)

Argentina's Rosario Luchetti, left, and South Africa's Marsha Marescia vie for the ball during their women's hockey preliminary round match at the 2012 Summer Olympics, Sunday, July 29, 2012, in London. (AP Photo/Eranga Jayawardena)

China's Song Qingling, right, and South Korea's Han Hye-lyoung vie for the ball during their women's hockey preliminary round match against at the 2012 Summer Olympics, Sunday, July 29, 2012, in London. (AP Photo/Eranga Jayawardena)

Japan's Maya Yoshida, rear, vies for the ball with Morocco's Houssine Kharja (14) during the group D men's soccer match at St James' Park in Newcastle, England, at the London 2012 Summer Olympics, Sunday, July 29, 2012. (AP Photo/Scott Heppell)

Hungary's Aron Szilagy, left, competes with Russia's Nikolay Kovalev during a semifinal in the men's fencing individual sabre at the 2012 Summer Olympics, Sunday, July 29, 2012, in London. (AP Photo/Andrew Medichini)

Chinese gymnast Huang Qiushuang performs on the beam during the Artistic Gymnastics women's qualification at the 2012 Summer Olympics, Sunday, July 29, 2012, in London. (AP Photo/Gregory Bull)

Malin Petersen, of Sweden, and her horse Sofarsogood, exit the ring after competing in the equestrian eventing dressage phase at the 2012 Summer Olympics, Sunday, July 29, 2012, in London. (AP Photo/David Goldman)

Japanese gymnast Yu Minobe performs on the balance beam during the Artistic Gymnastic women's qualifications at the 2012 Summer Olympics, Sunday, July 29, 2012, in London. (AP Photo/Julie Jacobson)

Great Britain's Shauna Mullin, right, battles Canada's Annie Martin during a beach volleyball match at the 2012 Summer Olympics, Sunday, July 29, 2012, in London. (AP Photo/Dave Martin)

Spanish center Serge Ibaka (14) is challenged by Chinese center Yi Jianlian during the men's basketball preliminary round group A match B match between Spain and China at the London 2012 Summer Olympics, on Sunday, July 29, 2012 London. (AP Photo/Mark Ralston, Pool)

Britain's Georgi Twigg and Japan's Kaori Jujio, back, vie for the ball during their women's hockey preliminary round match at the 2012 Summer Olympics, Sunday, July 29, 2012, in London. (AP Photo/Eranga Jayawardena)

Marie-Andree Lessard of Canada can't get to a ball during a beach volleyball match against Great Britain at the 2012 Summer Olympics, Sunday, July 29, 2012, in London. (AP Photo/Dave Martin)

Phil Dalhausser of the United States makes a save during a beach volleyball match against Japan at the 2012 Summer Olympics, Sunday, July 29, 2012, in London. (AP Photo/Dave Martin)

Talita Antunes from Brazil spikes the ball against Netherlands during the Beach Volleyball match at the 2012 Summer Olympics, Sunday, July 29, 2012, in London. (AP Photo/Petr David Josek)

Ruslan Makarov of Uzbekistan competes during the men's 56-kg, group A, weightlifting competition at the 2012 Summer Olympics, Sunday, July 29, 2012, in London. (AP Photo/Hassan Ammar)

Venezuela's Gabriel Maestre Perez fights Iran's Amin Ghasemi Pour during their men's welterweight 69-kg boxing match at the 2012 Summer Olympics, Sunday, July 29, 2012, in London. (AP Photo/Ivan Sekretarev)

China's Cai Yun, top left, and Fu Haifeng play against Germany's Johannes Schoettler, foreground, and Ingo Kindervater, unseen, at a men's doubles badminton match of the 2012 Summer Olympics, Sunday, July 29, 2012, in London. (AP Photo/Saurabh Das)

Phil Dalhausser, left, of US looks on as his teammate Todd Rogers, right, dives for a ball during their Beach Volleyball match against Japan at the 2012 Summer Olympics, Sunday, July 29, 2012, in London. (AP Photo/Petr David Josek)

Khalil El Maoui of Tunisia competes during the mens 56-kg, group A, weightlifting competition at the 2012 Summer Olympics, Sunday, July 29, 2012, in London. (AP Photo/Mike Groll)

South Korea's Han Hye-lyoung tries to score on a penalty as China's Ma Wei defends during their women's hockey preliminary match at the 2012 Summer Olympics, Sunday, July 29, 2012, in London. China won 4-0. (AP Photo/Bullit Marquez)

U.S. gymnast Kyla Ross performs on the balance beam during the Artistic Gymnastics women's qualification at the 2012 Summer Olympics, Sunday, July 29, 2012, in London. (AP Photo/Gregory Bull)

Anna Gallay from Argentina reaches for a ball during the Beach Volleyball match against USA at the 2012 Summer Olympics, Sunday, July 29, 2012, in London. (AP Photo/Petr David Josek)

Canada's Clara Hughes, right, leads the pack during the women's cycling road race final at the 2012 Summer Olympics on Sunday, July 29, 2012, in London. (AP Photo/Stefano Rellandini, Pool)

Germany's Claudia Verdicchio-Krause concentrates between shots during the qualifiers for the women's 10-meter air pistol event, at the 2012 Summer Olympics, Sunday, July 29, 2012, in London. (AP Photo/Rebecca Blackwell)

Laszlo Nagy of Hungary celebrates after scoring during their men's handball preliminary match against Denmark at the 2012 Summer Olympics, Sunday, July 29, 2012, in London. (AP Photo/Matthias Schrader)

Jose Lino Montes Gongora of Mexico competes during the men's 56-kg, group A, weightlifting competition at the 2012 Summer Olympics, Sunday, July 29, 2012, in London. (AP Photo/Hassan Ammar)

China's Sun Yang, left, and South Korea's Park Tae-hwan prepare for a men's 200-meter freestyle swimming semifinal at the Aquatics Centre in the Olympic Park during the 2012 Summer Olympics in London, Sunday, July 29, 2012. (AP Photo/Mark J. Terrill)

Spain's Isco, right, vies for the ball with Honduras' Arnold Peralta, left, during the group D men's soccer match at St. James' Park, in Newcastle, England, during the London 2012 Summer Olympics, Sunday, July 29, 2012. (AP Photo/Scott Heppell)

Zara Dampney from Great Britain dives for a ball during the Beach Volleyball match against Canada at the 2012 Summer Olympics, Sunday, July 29, 2012, in London. (AP Photo/Petr David Josek)

Ireland's Eoin Rheinisch competes in the heats of the K-1 men's canoe slalom at Lee Valley Whitewater Center, at the 2012 Summer Olympics, Sunday, July 29, 2012, in London. (AP Photo/Kirsty Wigglesworth)

Anna Gallay from Argentina dives for a ball during the Beach Volleyball match against USA at the 2012 Summer Olympics, Sunday, July 29, 2012, in London. (AP Photo/Petr David Josek)

Spanish gymnast Ana Maria Izurieta performs on the uneven bars during the Artistic Gymnastic women's qualifications at the 2012 Summer Olympics, Sunday, July 29, 2012, in London. (AP Photo/Julie Jacobson)

Chinese gymnast Huang Qiushuang performs on the floor during the Artistic Gymnastic women's qualifications at the 2012 Summer Olympics, Sunday, July 29, 2012, in London. (AP Photo/Julie Jacobson)

Chinese centre Yi Jianlian, center, shoots, during the men's basketball preliminary round group A match B match between Spain and China at the London 2012 Summer Olympics, on Sunday, July 29, 2012 London. (AP Photo/Mark Ralston, Pool)

Britain's Scott Sinclair, right, congratulates fellow teammate Daniel Sturridge, left, after Sturridge's scored during the men's group A soccer match between Britain and the United Arab Emirates at the 2012 Summer Olympics, Sunday, July 29, 2012, at Wembley Stadium in London. (AP Photo/Ben Curtis)

Ruslan Makarov of Uzbekistan competes during the mens 56-kg, group A, weightlifting competition at the 2012 Summer Olympics, Sunday, July 29, 2012, in London. (AP Photo/Mike Groll)

Great Britain's Freddie Evans, and Algeria's Ilyas Abbadi, fight during their men's welter 69-kg boxing match at the 2012 Summer Olympics, Sunday, July 29, 2012, in London. (AP Photo/Ivan Sekretarev)

Paolo Nicolai of Italy dives for the ball as Daniele Lupe watches during a beach volleyball match against Switzerland at the 2012 Summer Olympics, Sunday, July 29, 2012, in London. (AP Photo/Dave Martin)

Flower presenters stand by during a medals ceremony for the men's 56-kg, group A, weightlifting competition at the 2012 Summer Olympics, Sunday, July 29, 2012, in London. (AP Photo/Mike Groll)

Rosalba Forciniti of Italy (in blue) competes against Kim Kyung-ok of South Korea during the women's -52kg judo competition at the 2012 Summer Olympics, Sunday, July 29, 2012, in London. (AP Photo/Paul Sancya)

United States men's water polo athletes react with coach Terry Schroeder, right, after beating Montenegro 8-7 in a preliminary water polo match at the 2012 Summer Olympics, Sunday, July 29, 2012, in London. (AP Photo/Julio Cortez)

Britain's Pops Mensah-Bonsu tries unsuccessfully to block a dunk by Russia's Andrei Kirilenko during a men's basketball game at the 2012 Summer Olympics, Sunday, July 29, 2012, in London. (AP Photo/Charles Krupa)

Annie Martin from Canada dives for a ball during the Beach Volleyball match against Great Britain at the 2012 Summer Olympics, Sunday, July 29, 2012, in London. (AP Photo/Petr David Josek)

Argentina's Pablo Prigioni, top, and Lithuania's Mantas Kalnietis dive for the ball during a men's basketball game at the 2012 Summer Olympics, Sunday, July 29, 2012, in London. (AP Photo/Charles Krupa)

Timothy Hutten of the United States, right, gets set to pass the ball as Gragan Draskovic of Montenegro goes to defend during their preliminary round mens water polo match at the 2012 Summer Olympics, Sunday, July 29, 2012, in London. (AP Photo/Alastair Grant)

Marie-Andree Lessard of Canada returns a shot as teammate Annie Martin watches during a beach volleyball match against Great Britain at the 2012 Summer Olympics, Sunday, July 29, 2012, in London. (AP Photo/Dave Martin)

Serbia's Vlado Petkovic, right, blocks the shot from United States' William Priddy, left, during a men's preliminary volleyball match at the 2012 Summer Olympics, Sunday, July 29, 2012, in London. (AP Photo/Jeff Roberson)

The hand of Romania's gymnast Sandra Raluca Izbasa show calluses as she performs on the floor during the Artistic Gymnastics women's qualification at the 2012 Summer Olympics, Sunday, July 29, 2012, in London. (AP Photo/Gregory Bull)

Gymnast Rebecca Tunney from Great Britain sprays liquid on her hand before a performance during the artistic gymnastics women's qualifications at the 2012 Summer Olympics, Sunday, July 29, 2012, in London. (AP Photo/Matt Dunham)

Japan's Reiko Shiota returns the shuttlecock while playing with teammate Shintaro Ikeda against Toby NG and Grace Gao, of Canada, in a mixed doubles badminton match at the 2012 Summer Olympics, Sunday, July 29, 2012, in London. (AP Photo/Andres Leighton)

Germany's Fanny Rinne, left, brings the ball closer to the goal as United States' Michelle Vittese defends during the women's hockey preliminary match at the 2012 Summer Olympics, Sunday, July 29, 2012, in London. Germany won 2-1. (AP Photo/Bullit Marquez)

Russian gymnast Victoria Komova performs on the uneven bars during the Artistic Gymnastics women's qualification at the 2012 Summer Olympics, Sunday, July 29, 2012, in London. (AP Photo/Gregory Bull)

U.S. forward Carmelo Anthony, second from left, reacts after shooting while being challenged by French forward Boris Diaw, right, next to French guard Tony Parker, right, during the men's basketball preliminary round group A match between the United States and France at the 2012 Summer Olympics, on Sunday, July 29, 2012 in London. (AP Photo/Mark Ralston, Pool)

Chinese gymnast Yao Jinnan performs on the floor during the Artistic Gymnastic women's qualifications at the 2012 Summer Olympics, Sunday, July 29, 2012, in London. (AP Photo/Julie Jacobson)

Phil Dalhausser of the United States blocks the shot of Katsuhiro Shiratori of Japan during a beach volleyball match against Japan at the 2012 Summer Olympics, Sunday, July 29, 2012, in London. (AP Photo/Dave Martin)

Novak Djokovic of Serbia returns a shot to Fabio Fognini at the All England Lawn Tennis Club at Wimbledon, in London, at the 2012 Summer Olympics, Sunday, July 29, 2012. (AP Photo/Mark Humphrey)

China's Li Hongxia controls the ball during the team's women's hockey preliminary round match against South Korea at the 2012 Summer Olympics, Sunday, July 29, 2012, in London. (AP Photo/Eranga Jayawardena)

France's Etienne Daille eyes the gate as he competes in the men's K-1 kayak slalom heats at the Lee Valley White Water Center ahead of the 2012 Summer Olympics, Sunday, July 29, 2012, in London. (AP Photo/Victor R. Caivano)

United States' Michael Phelps watches his team in the men's 4x100-meter freestyle relay final at the Aquatics Centre in the Olympic Park during the 2012 Summer Olympics in London, Sunday, July 29, 2012. (AP Photo/Mark J. Terrill)

Chinese gymnast Huang Qiushuang performs on the floor during the Artistic Gymnastics women's qualification at the 2012 Summer Olympics, Sunday, July 29, 2012, in London. (AP Photo/Gregory Bull)

Shauna Mullin from Great Britain reacts during the Beach Volleyball match against Canada at the 2012 Summer Olympics, Sunday, July 29, 2012, in London. (AP Photo/Petr David Josek)

Russian gymnast Aliya Mustafina performs on the uneven bars during the Artistic Gymnastic women's qualifications at the 2012 Summer Olympics, Sunday, July 29, 2012, in London. (AP Photo/Julie Jacobson)

France's Yannick Agnel competes in a men's 200-meter freestyle swimming semifinal at the Aquatics Centre in the Olympic Park during the 2012 Summer Olympics in London, Sunday, July 29, 2012. (AP Photo/Mark J. Terrill)

Sergio Alvarez Boulet of Cuba competes during the mens 56-kg, group A, weightlifting competition at the 2012 Summer Olympics, Sunday, July 29, 2012, in London. (AP Photo/Mike Groll)

Sophie Van Gestel of the Netherlands dives for the ball during a beach volleyball match against Brazil at the 2012 Summer Olympics, Sunday, July 29, 2012, in London. (AP Photo/Dave Martin)

Britain's captain Kate Walsh, left, walks off of the field after being injured during the women's hockey preliminary round match against Japan at the 2012 Summer Olympics, Sunday, July 29, 2012, in London. (AP Photo/Eranga Jayawardena)

Japanese gymnast Yu Minobe performs on the balance beam during the Artistic Gymnastic women's qualifications at the 2012 Summer Olympics, Sunday, July 29, 2012, in London. (AP Photo/Julie Jacobson)

Germany's Claudia Verdicchio-Krause takes a break from shooting during the qualifiers for the women's 10-meter air pistol event, at the 2012 Summer Olympics, Sunday, July 29, 2012, in London. (AP Photo/Rebecca Blackwell)

Russian gymnast Aliya Mustafina performs on the uneven bars during the Artistic Gymnastics women's qualification at the 2012 Summer Olympics, Sunday, July 29, 2012, in London. (AP Photo/Gregory Bull)

Fabio Fognini of Italy returns a shot to Novak Djokovic at the All England Lawn Tennis Club at Wimbledon, in London, at the 2012 Summer Olympics, Sunday, July 29, 2012. (AP Photo/Mark Humphrey)

Israeli tennis player Shahar Peer in action during her First Round match on Centre Court in the Women's Singles at the Olympic Tennis Venue, Wimbledon, London, at the 2012 Summer Olympics, on Sunday, July 29, 2012. (AP Photo/Mark Allan)

United States' Donald Suxho cannot reach a ball as it lands in for a point for Serbia during a men's preliminary volleyball match at the 2012 Summer Olympics, Sunday, July 29, 2012, in London. (AP Photo/Jeff Roberson)

Denmark's Michael Knudsen, right, shoots as Timuzsin Schuch of Hungary, left tries to stop him, during their men's handball preliminary match at the 2012 Summer Olympics, Sunday, July 29, 2012, in London. (AP Photo/Vadim Ghirda)

German tennis player Julia Goerges, in action during her First Round match on Centre Court in the Women's Singles at the Olympic Tennis Venue, Wimbledon, London, at the 2012 Summer Olympics, on Sunday, July 29, 2012. (AP Photo/Mark Allan)