Juan Martin del Potro of Argentina holds his racquet up and claps after winning his match against Nicolas Mahut of France during the Sydney International Tennis Tournament in Sydney, Australia, Wednesday, Jan. 8, 2014. (AP Photo/Rob Griffith)
Juan Martin del Potro of Argentina plays a backhand shot in his match against Nicolas Mahut of France during the Sydney International Tennis Tournament in Sydney, Australia, Wednesday, Jan. 8, 2014. (AP Photo/Rob Griffith)
Petra Kvitova of the Czech Republic reacts after winning a point against Christina McHale of the U.S. during their women's singles match at the Sydney International tennis tournament in Sydney, Australia, Tuesday, Jan. 7, 2014. (AP Photo/Daniel Munoz)
Petra Kvitova of the Czech Republic hits a backhand to Christina McHale of the U.S. during their women's singles match at the Sydney International tennis tournament in Sydney, Australia, Tuesday, Jan. 7, 2014. (AP Photo/Daniel Munoz)
Philadelphia 76ers' Evan Turner (12) shoots over Cleveland Cavaliers' Matthew Dellavedova (9), from Australia, during the second quarter of an NBA basketball game Tuesday, Jan. 7, 2014, in Cleveland. (AP Photo/Tony Dejak)