Florian Mayer of Germany makes a forehand return to Jerzy Janowicz of Poland during their third round match at the Australian Open tennis championship in Melbourne, Australia, Friday, Jan. 17, 2014. (AP Photo/Shuji Kajiyama)
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Florian Mayer of Germany serves to Jerzy Janowicz of Poland during their third round match at the Australian Open tennis championship in Melbourne, Australia, Friday, Jan. 17, 2014. (AP Photo/Shuji Kajiyama)
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Jerzy Janowicz of Poland serves to Florian Mayer of Germany during their third round match at the Australian Open tennis championship in Melbourne, Australia, Friday, Jan. 17, 2014. (AP Photo/Shuji Kajiyama)
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Jerzy Janowicz of Poland makes a forehand return to Florian Mayer of Germany during their third round match at the Australian Open tennis championship in Melbourne, Australia, Friday, Jan. 17, 2014. (AP Photo/Shuji Kajiyama)
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Jerzy Janowicz of Poland takes a rest between games during his third round match against Florian Mayer of Germany at the Australian Open tennis championship in Melbourne, Australia, Friday, Jan. 17, 2014. (AP Photo/Shuji Kajiyama)
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Jerzy Janowicz of Poland serves to Florian Mayer of Germany during their third round match at the Australian Open tennis championship in Melbourne, Australia, Friday, Jan. 17, 2014. (AP Photo/Shuji Kajiyama)
