Two-time Grand Slam champion Amelie Mauresmo pulled out of the US Open on Wednesday, citing a groin injury and the need to recover fully from the appendectomy she had in March.
Mauresmo hasn't played in a tournament since losing in the fourth round at Wimbledon on July 3, although she did participate in France's Fed Cup semifinal from July 14-15.
She put at least part of the blame for her third-round loss at the French Open in June on the groin problem.
"My doctor has recommended that I allow myself additional time to rest and recover from this injury so that it is completely healed," Mauresmo said in a statement released by the WTA tour.
"Obviously, this is one of the worst times of the year for me to have an injury."
Mauresmo, formerly ranked No. 1 and now No. 7, won the Australian Open and Wimbledon in 2006. She reached the quarterfinals or semifinals at the US Open each of the past six years.