United States Michael Phelps, left, and Ryan Lochte start the men's 200-meter individual medley swimming semifinal at the Aquatics Centre in the Olympic Park during the 2012 Summer Olympics in London, Wednesday, Aug. 1, 2012. (AP Photo/Lee Jin-man)

Photo by: Lee Jin-man

United States Michael Phelps, left, and Ryan Lochte start the men's 200-meter individual medley swimming semifinal at the Aquatics Centre in the Olympic Park during the 2012 Summer Olympics in London, Wednesday, Aug. 1, 2012. (AP Photo/Lee Jin-man)