American Serena Williams pulled out due to left knee surgery.

San Diego, Withdrawals:
#1 s1 Serena Williams USA left quadriceps strain
#17 Vera Zvonareva RUS left elbow
#23 Nathalie Dechy FRA right wrist
#27 Alexandra Stevenson USA right shoulder

    (July 29, 2003) s1 # 1 Serena Williams withdrew from the Acura Classic on
Monday night due to left knee pain. Serena had surgery on Friday, Aug. 1st,
and will miss the US Open, although a full recovery is expected.