Battling Serena edges past Zheng

Serena Williams survived by far the biggest first-week test of her Wimbledon campaign as she came from a set down to see off the gutsy challenge of 25th seed Jie Zheng.

Williams previously held a 5-0 win-loss record over Zheng, but the Chinese produced some excellent tennis today to make the American look ordinary at times on the Centre Court where she has previously won four Wimbledon titles.