Novak Djokovic has parted company with coach Boris Becker after three years, the world number two has confirmed. After Beckers appointment in December 2013 the Serbian won six grand slam titles and held all four major titles at once during a sustained period of dominance at the summit of the mens game.

The 29-year-old Djokovic completed the career grand slam and claimed his 12th major after winning the French Open at Roland Garros in June this season, but then suffered a significant downturn in form. He was knocked out of Wimbledon in the third round, lost his opening match at the Olympics and was defeated in the US Open final by Stanislas Wawrinka.

Andy Murray overhauled Djokovic as world number one in November before securing the year-end ranking at the season-ending ATP World Tour Finals. A troubling end to the season for Djokovic was accompanied by the appointment of Spanish spiritual guru Pepe Imaz alongside Slovakian Marian Vajda for the final two tournaments of the year, leading to speculation over the make-up of his team for the new season.

After three very successful years, Boris Becker and I have jointly decided to end our cooperation, a statement read on Djokovics official Facebook page. 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.

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. In this regard I will make all future decisions.

Djokovic and Beckers partnership was largely derided upon its confirmation at the end of the 2013 season. However it proved fruitful from the outset. The right-hander reached nine finals in 12 grand slams during his time with the German, himself a six-time major champion as a player.

But as Djokovics season unravelled Beckers role became less certain as the former world number one became increasingly less committal about his retention. Though Djokovic has been keen to blame a lack of motivation for his loss of form, Becker had indicated that other issues were contributing to his on-court troubles.