
Monfils, who is seeded as number 14 for the All England Club, will have to now be replaced in the men's singles draw by some other player who has qualified to take part in his stead.
And Rafael Nadal from Spain, who is the world number one in the tennis rankings, will have to decide if he is fit enough to compete because he has been suffering from an injury problem as well.
Tommy Haas is seeded as number 24 following his defeat of Novak Djokovic on Sunday at the tournament in Halle.