Novak Djokovic has hired a new coach -- longtime friend and rival Andy Murray, who retired from competitive tennis this summer. Djokovic split with coach Goran Ivanisevic after six years earlier this summer, and he's counting on Murray to help him ...

Andy Murray is set to take up a surprise role as coach for long-time rival Novak Djokovic, the duo confirmed in a blockbuster announcement on Saturday.

Novak Djokovic announced that Andy Murray will be his coach for the offseason and Australian Open in a post to social media on Saturday.