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 going through tough waters, and fans are thinking she's done. The 27-year-old faced another premature exit at the ongoing Citi DC Open in Washington.

During the video essay, Mouratoglou highlighted the changing profile of players in terms of height and body composition, while pinpointing Carlos Alcaraz as an ‘exception.’ Mouratoglou said: “Clearly there is a change in terms of body type of the tennis player for the last years.