Australian Open 2014

Novak Djokovic of Serbia signs autographs after his men's singles match against Lukas Lacko of Slovakia at the Australian Open 2014 tennis tournament in Melbourne

David Gray/Reuters

Novak Djokovic of Serbia signs autographs after his men’s singles match against Lukas Lacko of Slovakia at the Australian Open 2014 tennis tournament in Melbourne. Djokovic won 6-3 7-6 (7-2) 6-1.