LONDON — Two-time Grand Slam champion Mary Pierce withdrew from France's Olympic tennis team today because of a knee injury and was replaced by Pauline Parmentier.

The 33-year-old Pierce has not played since undergoing knee surgery in 2006 and was a surprise selection over Amelie Mauresmo in the singles.

Mauresmo was initially selected as Pierce's replacement in Beijing, but the International Tennis Federation said Monday that she would not participate.

Mauresmo had previously announced she would skip the doubles competition to focus on the U.S. Open.

Robin Haase and Michaella Krajicek of the Netherlands also withdrew because of injuries, and will be replaced by Jurgen Melzer of Austria and Kateryna Bondarenko of Ukraine, respectively.