The mental toll of professional tennis will be in focus as the curtain rises at the French Open next week, a year after four-time major winner Naomi Osaka sparked intense debate around athletes' mental health.

The former world No. 1 stunned the tennis world when she withdrew from the clay-court major after boycotting post-match media duties, prompting a row with tournament officials.

The Japanese player revealed she had been suffering from depression for almost three years, setting off a ripple effect as top athletes like Olympic gymnastics great Simone Biles put their well-being into focus.