• Bounces back from Wimbledon disappointment
• Beats Nishikori for ninth straight time
• Turns focus to Rio Olympics

Djokovic, a 12-time grand slam champion, will now turn his focus to the Rio Olympics, a tournament he has yet to conquer.

He earned a bronze medal in singles at Beijing in 2008 and fell just short of a medal at London in 2012.

"I don't need to explain that every athlete dreams of being a part of the Olympic Games," he said. "I'm competing in singles and doubles.

"Hopefully I'll get at least one medal."