Hingis led 6-3, 3-1 when her 19-year-old Russian opponent informed the chair umpire she could not continue. Chakvetadze stopped after her fourth on-court visit from a trainer, prompting a smattering of boos from the Uniprix Stadium crowd.

"It's kind of disappointing to win a match like this, but I was already up a set and 3-1," Hingis said. "She was hurting, but she continued. You still have to keep your focus and make her play because you don't know how much it's hurting."

Chakvetadze was the seventh player in the tournament to either withdraw from a match or fail to finish because of injury. Several stars pulled out even before the hard-court event began.

"People are upset because there were so many withdrawals this week," Chakvetadze said. "I know it was not personal. I wish I could have played until the end but I just couldn't."

Hingis, the Rogers Cup champ in 1999 and 2000, will play for the title Sunday against the winner of the semifinal between Ana Ivanovic of Serbia and Dinara Safina of Russia.

The unseeded Chakvetadze was treated on court twice during the first set, again between sets and again after losing her service to trail 3-1 in the second.

Despite the retirement, Chakvetadze is projected to return to her career-high ranking of No. 24 with her performance this week.

Hingis will rejoin the top 10 for the first time since 2002. The Swiss star was once ranked No. 1, and from 1996-02 won more than 40 tournaments, including five majors. She left the WTA Tour for three years because of foot and ankle injuries, but returned at the start of this year.