ROME -- Martina Hingis will have ankle surgery Monday and miss the French Open, the only major title she hasn't won.

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).