At the Olympics in London, Fraser-Pryce won her 100 m heat and semifinal in 11.00 s and 10.85 s respectively. She progressed to the final as the second fastest qualifier behind Carmelita Jeter, who ran 10.83 s in each of her respective rounds. In the 100 m final, Fraser-Pryce was quickest from the blocks with Jeter in close pursuit, and she ultimately leaned at the finish line for a narrow victory to defend her title. Her time of 10.75 s was the second fastest in Olympic history at the time, while the race itself was the fastest Olympic 100 m final, placing six women under 11 seconds. Jeter claimed silver in a season's best 10.78 s, the fastest runner-up time in Olympic history, and Campbell-Brown earned bronze in 10.81 s. With her win, Fraser-Pryce joined Americans Wyomia Tyus (1964, 1968) and Gail Devers (1992, 1996) as the only women to defend an Olympic 100 m title. Days later in the 200 m final, Fraser-Pryce lowered her personal best to 22.09 s. However, she was unable to overhaul Allyson Felix of the U.S., who took the gold in 21.88 s. Fraser-Pryce later earned a second silver medal in the 4 × 100 m relay, running alongside Campbell-Brown, Sherone Simpson and Kerron Stewart. Their finishing time of 41.41 s was a new Jamaican record, but well behind the United States' world record of 40.82 s.