World Number One Naomi Osaka has parted ways with her coach Sascha Bajin sixteen days after she won the Australian Open.
The Japanese, 21, worked with the German for just over a year before they separated.
“I will no longer be working together with Sascha. I thank him for his work and wish him all the best in the future,” Osaka tweeted.
Bajin was named WTA coach of the year for 2018. He is a former hitting partner of Grand Slam champions Serena Williams, Victoria Azarenka and Caroline Wozniacki.
Bajin thanked Osaka and said he wished her “nothing but the best.”
“What a ride that was. Thank you for letting me be part of this,” he tweeted.
Under Bajin, Osaka rose from world number 72 at the start of 2018 to the summit of the rankings little over a year later.