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 has parted ways with Patrick Mouratoglou after a 10-month partnership that didn’t yield the results either hoped for.

Naomi Osaka has announced the end of her association with Patrick Mouratoglou after less than a year of collaboration. The former world No. 1 decided to boost her career in late 2024 by hiring the former Serena Williams coach,