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.

Naomi Osaka is reportedly set to work with Tomasz Wiktorowski, the former coach of Iga Swiatek. The four-time Major winner announced her sudden split from Patrick Mouratoglou on Sunday, days after Emma Raducanu beat her in the second round of the WTA 500 in Washington.

Naomi Osaka has parted company with coach Patrick Mouratoglou less than a year after the pair began working together, the four-times Grand Slam champion said days after her defeat to Emma Raducanu at the Washington Open.