 On 21 August, Jamaica completed a clean-sweep of all the individual sprints (100 and 200 m), and confirmed the nation's dominance when Veronica Campbell-Brown successfully defended her Olympic 200 m title winning the event ahead of Allyson Felix of the United States, and Kerron Stewart who took bronze.On 22 August, the Jamaican women's and men's 4 x 100 m relay teams took to the track.Their chances for victory were boosted when both American 4 x 100 m teams were knocked-out in the heats.