Graf Out Indefinitely

Steffi Graf’s knee injury will sideline her until at least late April, meaning she could lose her No. 1 tennis ranking to 16-year-old Martina Hingis.

“The injury is worse than I thought,” Graf said in a television interview. “I have to have a break of four to five weeks, then we’ll see.”

Hingis has won four tournaments in a row, including the Australian Open, and could assume the No. 1 spot at the end of March.