After winning the world numberone has broken up with her coach Sascha Bajin 16 days.

The Japanese 21-year-old, whose win in Melbourne sealed back Grand Slam titles, caused the German for just over a calendar yr.

“I will no longer be working together with Sascha,” Osaka tweeted.

Bajin was appointed WTA coach of this season for 2018.

He’s a hitting partner of , Grand Slam champions Serena and Caroline Wozniacki.

Bajin thanked Osaka and said he hed her”only the most effective”.

“What a ride that was,” he also tweeted. “Thanks for letting me be part of the .”

At the start of this 2018, Osaka climbed under Bajin to the summit of their rankings over a yr.

No reason was given for that separation, that includes less than just six months later he said he had been init for the long haul.