Allyson Felix is well on her way to repeat gold after gliding her way into the Olympic 400m semifinal. The national champion won her heat of the 400m with ease in an effortless 51.24 seconds to earn a spot into the 400m semifinal Saturday in Rio de Janeiro. 

.@allysonfelix cruises in to the 400m semi final.

Still several heats to come: https://t.co/eyXkFfmH0I #Athletics pic.twitter.com/BMoLZGu1cX

— IAAF (@iaaforg) August 13, 2016

Felix is returning from winning gold in the 200m at the 2012 Olympic Games in London. However, an injury sidelined her for much of the 2016 season and forced her to hold off on racing competitively until the Olympic Trials. She showed her dominance in the 400m by clocking 49.68, a world lead and season's best. Unfortunately, she was unable to qualify in her signature event, the 200m, as the race came down to a close 3-4 finish between her and Jenna Prandini.

Felix has since returned to health and expressed confidence in her fitness at the team training camp two weeks ago. 



Her American teammate Phyllis Francis also managed to advance with ease after finishing first in her respective heat with a time of 50.58 ahead of Oluwakemi Adekoya of Bahrain.

Natasha Hastings rounded out the American sweep with a victory in heat four. Hastings claimed the victory in 51.31 over Great Britain's Christine Ohuruogu.

The semifinal of the women's 400m will take place on Sunday at 6:35 p.m. CT.