Maria Sharapova and coach of four years Sven Groeneveld have “mutually agreed” to part company, according to a report from the BBC.
The pair remained a team during Sharapova’s 15-month doping ban for taking meldonium in 2016, but have now called time on their partnership.
Groeneveld had previously worked with some of the top names in the sport, including Ana Ivanovic, Caroline Wozniacki and Britain’s Greg Rusedski.
Groeneveld spoke extremely highly of Sharapova in a statement put out after the pair went their separate ways.
Maria has been one of the most hardworking and professional players I have ever worked with and I have the deepest respect for her as a player and person.
The Dutch coach started working with Sharapova in 2014, and helped her to win the French Open that season.
But the 30-year-old Russian has been in poor form so far this season, winning just five matches this year, and was beaten in the first round at Indian Wells.
The split has came as a surprise to many, and it is still unknown who Sharapova will turn to next as she looks to find top form once again.