She had a strong start to the 2010 outdoor season in April, running an early world lead and 100 m meet record of 11.06 seconds at the Drake Relays. She equalled her 200 m best in Baie Mahault in May and went on to win the 100 m at the Grande Prêmio Caixa Maringá de Atletismo in Maringá, Brazil later that month, going sub-11 for the first time in a personal best run of 10.97 seconds. It was the first time any female had broken the 11 second barrier on South American soil. She took second place in the 100 m 2010 USA Outdoor Track and Field Championships, finishing behind Allyson Felix.