Tests in Zurich this week revealed torn and loose ligaments in her left ankle, forcing her out of a Grand Slam tournament for the first time since she turned pro in October 1994.

``I am obviously very disappointed that I will be unable to play in Paris,'' Hingis said Friday. ``However, I am hopeful that the surgery on Monday will go well and that I can look forward to a speedy recovery. I will just need some time to rest and start a rehabilitation program.''

Her doctor said this week that Hingis might have to give up tennis because of joint injuries.

Dr. Heinz Buehlmann told a Swiss radio network Wednesday that the 21-year-old Hingis had severe pain in her feet, left knee and left hip, which had forced her to stop training.

The former No. 1 player had played in 29 straight Grand Slam events, winning five: the Australian Open, Wimbledon and U.S. Open in 1997, and the Australian in '98 and '99.

In seven appearances at the French Open, Hingis has been a finalist twice (1997 and '99) and a semifinalist three times ('98, '00 and '01).