HomeTennis-Serena Williams to retire from playing after U.S. OpenFILE PHOTO: Williams of the U.S. eyes the ball during

FILE PHOTO: Williams of the U.S. eyes the ball during

FILE PHOTO: Serena Williams of the U.S. eyes the ball during her women's singles semi-final match against Sara Errani of Italy at the French Open tennis tournament at the Roland Garros stadium in Paris June 6, 2013. Williams defeated Errani 6-0 6-1. REUTERS/Stephane Mahe/File Photo