The Australian Open

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Petra Kvitova of the Czech Republic returns to Luksika Kumkhum of Thailand during their first round match at the Australian Open tennis championship in Melbourne, Australia, Monday, Jan. 13, 2014. (AP Photo/Andrew Brownbill)

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Luksika Kumkhum of Thailand makes a backhand return to Petra Kvitova of the Czech Republic during their first round match at the Australian Open tennis championship in Melbourne, Australia, Monday, Jan. 13, 2014. (AP Photo/Andrew Brownbill)

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Luksika Kumkhum of Thailand celebrates a point won over Petra Kvitova of the Czech Republic during their first round match at the Australian Open tennis championship in Melbourne, Australia, Monday, Jan. 13, 2014. (AP Photo/Andrew Brownbill)