Felix and Gatlin powered to the fastest times in the world this year to book their tickets for the Rio Olympics 2016 at a high standard U.S. trials.
World champion Felix shook off an ailing ankle to win the women's 400 meters in 49.68 seconds before Justin Gatlin demanded the 100 meters over fellow world medalist Bromell in 9.80 seconds. The 20-year-old Bromell was second in 9.84.
World-leading performances were also recorded in the men's 400 meters, long jump, women's high jump and the decathlon.
Allyson Felix still running in pain, accelerated from fifth place off the bend to take the lead on the home straight and keep alive her hope of becoming only the third woman to complete a 200-400 double at the same Olympics.
She starts the 200 meters trials on Friday.
"Two months ago I couldn't walk," Felix Said. "Somehow we found a way."
Her coach Bob Kersee claimed the victory was the 30-year-old's best performance.
"I just gave it everything I had," Felix Said, who is her country's most decorated female sprinter. "Things were hitting me right and left but giving up wasn't on mt mind."
Justin Gatlin had shown in the semi-finals he was ready to make a statement by clocking 9.83 but the 34-year-old was pushed all the way by a fast-starting Bromell in the final before the 2004 Olympic gold medalist finished the stronger.
Reuters -- OmRiyadat