Rafael Nadal, the defending champion, is still questionable for the French Open after withdrawing from next week's Monte Carlo Masters due to a persistent hip issue.
The 11-time champion of the Monaco tournament and current world number 14 from Spain is unable to play right now due to injury.
The 36-year-old hasn't competed since losing to American Mackenzie McDonald in the second round of the Australian Open in January in straight sets.
Carlos Alcaraz, the second-ranked player in the world, has also left Monte Carlo.
The Spaniard, who is vying with Novak Djokovic for the top spot in the world rankings, is dealing with hand and back difficulties.
Alcaraz, who was defeated, said: "After two months overseas, I am pleased to be back home but unhappy because I concluded my last battle in Miami with bodily agony."
The 11-time champion of the Monaco tournament and current world number 14 from Spain is unable to play right now due to injury.
The 36-year-old hasn't competed since losing to American Mackenzie McDonald in the second round of the Australian Open in January in straight sets.
Carlos Alcaraz, the second-ranked player in the world, has also left Monte Carlo.
The Spaniard, who is vying with Novak Djokovic for the top spot in the world rankings, is dealing with hand and back difficulties.
Alcaraz, who was defeated, said: "After two months overseas, I am pleased to be back home but unhappy because I concluded my last battle in Miami with bodily agony."