This announced the number one double world ranking on Sunday. "I am very disappointed with Sascha's decision, I loved our work, and I think we could have done more," the 26-year-old said.

Under the direction of the 35-year-old Bajin Mladenovic had made up some 30 world rankings in the individual and achieved a single record of 26:17 victories, but in the three joint Grand Slam appearances she had failed in round two - at the US Open In round one she defeated the German top player Angelique Kerber.

For Kerber, who has been looking for a permanent coach since the departure of Coach Rainer Schüttler and is currently being looked after by Dirk Dier, Bajin could be interesting. The native-born Serb led Japan's Naomi Osaka to two Grand Slam titles before Osaka surprisingly split from Bajin in February. Bajin was previously Hitting partner of superstar Serena Williams (USA).