Serena Williams of the United States reacts after winning a point as she plays Kimiko Date-Krumm of Japan during their Women's singles match at the All England Lawn Tennis Championships in Wimbledon, London, Saturday, June 29, 2013. (AP Photo/Sang Tan)

Photo by: Sang Tan

Serena Williams of the United States reacts after winning a point as she plays Kimiko Date-Krumm of Japan during their Women's singles match at the All England Lawn Tennis Championships in Wimbledon, London, Saturday, June 29, 2013. (AP Photo/Sang Tan)