San Antonio Spurs' Patty Mills (8), of Australia, celebrates a score against the Chicago Bulls during the second half of an NBA basketball game, Wednesday, Jan. 29, 2014, in San Antonio. (AP Photo/Eric Gay)
10ThingstoSeeSports - Rafael Nadal, of Spain, makes a backhand return to Roger Federer, of Switzerland, during their semifinal at the Australian Open tennis championship in Melbourne, Australia, Friday, Jan. 24, 2014. (AP Photo/Rick Rycroft, File)
Stanislas Wawrinka of Switzerland signs autographs for fans, after defeating Rafael Nadal of Spain during the men's singles final at the Australian Open tennis championship in Melbourne, Australia, Sunday, Jan. 26, 2014. (AP Photo/Andrew Brownbill)
Stanislas Wawrinka of Switzerland kisses the trophy after defeating Rafael Nadal of Spainduring the men's singles final at the Australian Open tennis championship in Melbourne, Australia, Sunday, Jan. 26, 2014.(AP Photo/Aaron Favila)
Roger Federer of Switzerland walks off the Rod Laver Arena after his semifinal loss to Rafael Nadal of Spain during their semifinal at the Australian Open tennis championship in Melbourne, Australia, Friday, Jan. 24, 2014.(AP Photo/Andrew Brownbill)
Infiniti Red Bull Racing drivers Sebastian Vettel of Germany, left, and Daniel Ricciardo of Australia, right, attend the launch of their new RB10 Formula One car at the Circuito de Jerez on Tuesday, Jan. 28, 2014, in Jerez de la Frontera, Spain. (AP Photo/Miguel Angel Morenatti)
Switzerland's Stanislas Wawrinka poses with his Australian Open trophy on the banks of the Yarra River following his win over Spain's Rafael Nadal on Sunday evening in Melbourne, Australia, Monday, Jan. 27, 2014. (AP Photo/Mark Baker)
Switzerland's Stanislas Wawrinka poses for photographers with his Australian Open trophy on the banks of the Yarra River following his win over Spain's Rafael Nadal on Sunday evening in Melbourne, Australia, Monday, Jan. 27, 2014. (AP Photo/Mark Baker)
Switzerland's Stanislas Wawrinka sprays champagne as he celebrates his Australian Open men's singles final win over Spain's Rafael Nadal on Sunday evening in Melbourne, Australia, Monday, Jan. 27, 2014. (AP Photo/Aaron Favila)
Switzerland's Stanislas Wawrinka poses with his Australian Open trophy on the banks of the Yarra River following his win over Spain's Rafael Nadal on Sunday evening in Melbourne, Australia, Monday, Jan. 27, 2014. (AP Photo/Aaron Favila)
China's Li Na sprays champagne as she poses for photos at Brighton Beach with her Australian Open trophy following her win over Slovakia's Dominika Cibulkova in Melbourne, Australia, Sunday, Jan. 26, 2014. (AP Photo/Rick Rycroft)