US sprinter Allyson Felix (L) smiles beside Mayumi Watanabe (R) of Japan after crossing the finish line in the women's 100m dash at the Kawasaki track and field meet in Kawasaki, suburban Tokyo, on September 23, 2009. The 200m world champion clocked a time of 11.22 seconds to win the event. Getty Images logo Getty Images 2 months ago

US sprinter Allyson Felix (L) smiles beside Mayumi Watanabe (R) of Japan after crossing the finish line in the women's 100m dash at the Kawasaki track and field meet in Kawasaki, suburban Tokyo, on September 23, 2009. The 200m world champion clocked a time of 11.22 seconds to win the event.