[Rusty Backhand]

Defending champion Amelie Mauresmo of France made the semifinals of the $1.3 million Rogers Cup when Russian Nadia Petrova withdrew due to an injured right chest muscle in their rain-delayed quarterfinal match Friday night. Mauresmo and Petrova were tied 4-4 in the first set when they headed to the locker-room as a driving rain began to pelt the court.

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