Kei Nishikori announced Tuesday that he has split with his long time coach Dante Bottini.  The pair have worked together since 2011.

Bottini guided Nishikori to 11 of his 12 ATP titles and an Olympic bronze medal in 2016.  Nishikori reached a career high ranking of No. 4 during his partnership with Bottini. Nishikori was also coached by Michael Chang at majors.

“After nine years of working together literally day in and day out, I have decided it is time for a new voice,” wrote Nishikori, who is currently sidelined with a right-elbow injury.

“I am forever grateful for Dante’s contributions to my career and we will obviously remain very close friends. I appreciate so much the last 9 years and our friendship.”