Petra Kvitova of the Czech Republic makes a backhand return 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)
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)
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)