Stanislas Wawrinka of Switzerland celebrates after defeating Rafael Nadal of Spain during the men's singles final at the Australian Open tennis championship in Melbourne, Australia, on Sunday, Jan. 26, 2014.

Rick Rycroft / Associated Press

Stanislas Wawrinka of Switzerland celebrates after defeating Rafael Nadal of Spain during the men's singles final at the Australian Open tennis championship in Melbourne, Australia, on Sunday, Jan. 26, 2014.