KEY POINTS:
INDIAN WELLS, California - Vera Zvonareva sent world tennis No 1 Maria Sharapova to a stunning 4-6 7-5 6-1 defeat in the fourth round of the Pacific Life Open today.
In one the greatest collapses of her career, the defending champion failed to close out the match when 5-3 ahead in the second set and then completely lost control, giving up eight games in a row.
Sharapova ended the all-Russian contest with 47 unforced errors, including 13 double faults.
With the defeat, the 19-year-old is guaranteed to lose her No 1 ranking to Belgium's Justine Henin next week.
- REUTERS