Headlines were made earlier this month when Boris Becker quit coaching Novak Djokovic. Their partnership coming to an end after three successful years, but that doesn't mean a reunion may not be in the works in the future. The German realizes that a break between the two was needed, but doesn't rule out a possible return to Djoker's coaching staff down the line.

"I think we had three wonderful, successful years. But it was time to go separate ways. I call him a very good friend and he knows he can always call me if he needs something, but we both realised that it was a time for a break. That doesn't mean we couldn't come back together in the future. Who knows what is going to happen in a year or two?" he said.

Things were going along swimmingly at the start of the year when Djokovic claimed his sixth Aussie Open title, he then followed that up with a victory at the French Open, and it seemed that Nole was on course for a calendar Grand Slam. But, after that Nole hit a rough patch, partly due to a lingering wrist injury, as he bowed out in the third round of Wimbledon to Sam Querrey, then lost in the first round of the Rio Olympics to Juan Martin del Potro and lost to Stan Wawrinka in the U.S. Open final.

Without a title since July, Djokovic also lost the world number one ranking, as he was overtaken by Andy Murray. The Scot usurping the Serb after 122 weeks as the top player in men's tennis. Murray then beat him to win the season-ending ATP World Tour Finals, snapping the Djokovic's four-year domination of the London tournament.