Berlin: World number two Novak Djokovic confirmed on Tuesday he has split from his coach Boris Becker after three years working together."Becker, now 49 and who won six Grand Slams himself, reacted on Twitter by posting a photo of himself and Djokovic celebrating this year&ratchet socket wrench39;s French Open title, saying: "Thank U ! We had the time of our life ."In this regard I will make all future decisions."On the other hand, my professional plans are now directed primarily to maintain a good level of play, and also to make a good schedule and new goals for the next season.."Boris Becker and I have jointly decided to end our cooperation," Djokovic, who won this year's Australian and French Open titles, wrote on his official Facebook page.."After his Paris triumph in June, Djokovic had a complicated second half of the season, losing the world number one ranking he had held for 122 weeks from July 7, 2014 to Britain's Andy Murray in November.. After his Paris triumph in June, Novak Djokovic had a complicated second half of the season, losing the world number one ranking he had held for 122 weeks from July 7, 2014 to Britain's Andy Murray in November."The goals we set when we started working together have been completely fulfilled, and I want to thank him for the cooperation, teamwork, dedication and commitment," said the 29-year-old Djokovic.Djokovic also lost his Wimbledon and US Open titles and was eliminated in the first round of the Rio Olympics by eventual champion Juan Martin Del Potro of Argentina.Djokovic had made a change to his coaching team towards the end of the 2016 season with Pepe Imaz joining him for the Paris Masters.The Serb has won # 12 Grand Slam titles in his career -- six while working with Germany's Becker -- twice in Australia and Wimbledon and the French and US Open once.Djokovic had made a change to his coaching team towards the end of the 2016 season with Spaniard Pepe Imaz joining him for the Paris Masters, where the record four-time champion fell in the quarter-finals, and the World Tour Finals in London where he lost to Murray.