Stanislas Wawrinka of Switzerland celebrates after defeating Novak Djokovic of Serbia in their quarterfinal at the Australian Open tennis championship in Melbourne, Australia, Tuesday, Jan. 21, 2014.(AP Photo/Rick Rycroft)
Stanislas Wawrinka of Switzerland celebrates after defeating Novak Djokovic of Serbia in their quarterfinal at the Australian Open tennis championship in Melbourne, Australia, Tuesday, Jan. 21, 2014.(AP Photo/Rick Rycroft)