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Kirsty Wigglesworth, Associated Press
Britain's Duchess of Cambridge watches play on centre court with Gill Brook, left, wife of Chairman of the All England Lawn Tennis Club Philip Brook, at the All England Lawn Tennis Championships at Wimbledon, Monday, June 27, 2011.

WIMBLEDON, England — Former champion Maria Sharapova reached the Wimbledon quarterfinals Monday for the first time in five years, beating Peng Shuai 6-4, 6-2 on a sweltering day that featured the appearance of Prince William and Kate in the Royal Box.

Sharapova, the 2004 champion, started slowly before winning seven straight games to take command against the 20th-seeded Chinese player in an early match on Court 2.

The match was played with on-court temperatures measured at 93 degrees. Sharapova covered her legs with ice wrapped in towels during changeovers.

Sharapova could next face top-seeded Caroline Wozniacki, who was playing Dominika Cibulkova in the next match on Court 2.

Also advancing to the quarterfinals were Bernard Tomic, Victoria Azarenla and Sabine Lisicki.