Mona Barthel of Germany makes a backhand return during her second round match against  Luksika Kumkhum of Thailand at the Australian Open tennis championship in Melbourne, Australia, Wednesday, Jan. 15, 2014. (AP Photo/Shuji Kajiyama)

Australian Open Tennis

Mona Barthel of Germany makes a backhand return during her second round match against Luksika Kumkhum of Thailand at the Australian Open tennis championship in Melbourne, Australia, Wednesday, Jan. 15, 2014. (AP Photo/Shuji Kajiyama)

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