Allyson Felix is already among the most decorated track and field athletes of all time with six gold medals, and she has a chance to add one more to that collection after a qualifying effort in Wednesday’s women’s 400m semifinals.

Competing in her fifth Olympics, Felix crossed the finish line with an impressive season-best time of 49.89 seconds. She was outpaced slightly in Semifinal 3 by Stephenie Ann McPherson of Jamaica, who finished in 49.34 seconds and took the top spot overall.

Felix, who finished seventh overall in the semis, is joined in the final by U.S. teammate Quanera Hayes, who qualified at the No. 6 spot with a time of 49.81 seconds.