Novak Djokovic cracked a hilarious joke after the news broke out of him adding Andy Murray for the Australian Open as he referenced to one of the Briton's post that came just hours after he retired.

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

The recently retired Andy Murray is going to team up with longtime rival Novak Djokovic as his coach, they both announced Saturday, with plans to prepare for — and work together through — the Australian Open in January. It was a stunning bit of news as ...