BRUSSELS, Belgium -- Kim Clijsters' sprained ankle could force her to miss next week's tournament in Filderstadt, Germany, an event where Justine Henin-Hardenne can overtake her for the No. 1 ranking.
Clijsters will play with a taped ankle for the rest of the season, she said on her Web site Monday. She sprained her right ankle at the Sparkassen Cup in Leipzig, Germany, and quit during Saturday's semifinal against Anastasia Myskina.
If Clijsters does not play in Filderstadt, Belgian countrywoman Henin-Hardenne could become No. 1 by reaching the final. Clijsters won in Filderstadt last year.
Clijsters needs to rest several more days before resuming light training.
"A new assessment will then have to show how bad the injury is," she said. "I can only hope my participation in the Filderstadt tournament is not in danger."
Clijsters leads the WTA rankings with 6,579 points, with Henin-Hardenne at 6,291. Henin-Hardenne could become the third No. 1 this season, after Serena Williams yielded the top spot to Clijsters because of knee surgery in August.
Clijsters is the first No. 1 player without a Grand Slam title. Henin-Hardenne won this year's French Open and U.S. Open.