Allyson Felix is a sprinter. She has won three gold medals and one silver at the Summer Olympics. The only person who has beaten her in an Olympic race is Justin Gatlin in the 100-meter final in 2004. He earned $1 million for first place. Bolt surrendered his crown last month when he failed to win a medal at the World Championships. His best chance of picking up another came from the relay side, but America's Dina Asher-Smith outpaced him in the 100 meters and Michael Johnson Jr. did the same in the 200 meters to ensure that Felix became the first back-to-back winner since 1956-60. Asher-Smith became the first woman to ever win the 100 meters at three different Summer Olympics when she accomplished this feat in Rio de Janeiro last year, London 2012 and Beijing 2008. The 20-year-old also holds the British record in the event with her personal best of 10 seconds flat. Felix is second with a time of 11.41 seconds. Johnson was the top American runner at the Worlds last year but he finished outside the top eight this time around.