Williams of the US hits a return to Errani of Italy during their women's semifinals match at US Open Tennis Tournament in New York

Williams of the US hits a return to Errani of Italy

Serena Williams of the U.S. follows through on a return to Sara Errani of Italy during their women's semifinals match at the U.S. Open tennis tournament in New York September 7, 2012. REUTERS/Mike Segar (UNITED STATES - Tags: SPORT TENNIS)