STANFORD, CA - JULY 29:  Maria Sharapova of Russia returns a shot to Nadia Petrova of Russia on Day 3 of the Bank of the West Classic at Stanford University on July 29, 2009 in Stanford, California. Getty Images logo Getty Images 4 months ago

STANFORD, CA - JULY 29: Maria Sharapova of Russia returns a shot to Nadia Petrova of Russia on Day 3 of the Bank of the West Classic at Stanford University on July 29, 2009 in Stanford, California.