Wiktorowski coached Poland’s Iga Swiatek from late 2021 until last October. Read more at straitstimes.com. Read more at straitstimes.com.

Osaka, a four-time Grand Slam champion, has been in a career rut for years. Mouratoglou joined her staff in September of 2024 and there hasn't been much improvement. Osaka has not made it past the third round of a Grand Slam tournament since 2021 when she won the Australian Open. Now she will look for a new coach to help bring her back to form.

Tennis coach Rick Macci has highlighted what Naomi Osaka needs to do to return to her very best. Former world number one Osaka has had a tough time ever since returning to court after taking a long break to deal with pregnancy.