MADRID (AP) — Serena Williams withdrew from the Madrid Open on Monday after aggravating a right-leg injury in a first-round match against Francesca Schiavone.
The second-ranked Williams retired after losing the first set 6-4.
"I was just really hindered. My movement was hindered as a result of an injury I've been struggling with for some time," Williams said.
A downcast Williams said she had made too many commitments with her schedule this year and was paying the price.
"I'm trying to compete and do my best, and it didn't work out," she said.
Williams would not comment on the extent of the injury or whether it would keep her out of the French Open, which begins May 24.
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