Two-time champion Maria Sharapova has withdrawn from the French Open due to an ongoing shoulder problem.
American tennis player Nicole Gibbs will miss the French Open after being diagnosed with a rare form of cancer by her dentist.
Kevin Anderson has pulled out of all clay tournaments this season, including next month's French Open, to give himself time to recover from an elbow injury.
The French Open has increased its prize money by more than eight per cent for this year's tournament.
Roger Federer admitted he had "massive regrets" after failing to capitalise on his opportunities during a shock defeat against Stefanos Tsitsipas at the Australian Open.
Rafael Nadal says a decision will be made in the "coming months" on whether he will defend his French Open title next year.
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