STANFORD, CA - JULY 13: Serena Williams returns a shot to Chanelle Scheepers of South Africa during the Bank of the West Classic at Stanford University Taube Family Tennis Stadium on July 13, 2012 in... more 

STANFORD, CA - JULY 13: Serena Williams returns a shot to Chanelle Scheepers of South Africa during the Bank of the West Classic at Stanford University Taube Family Tennis Stadium on July 13, 2012 in Stanford, California. (Photo by Matthew Stockman/Getty Images) less