Felix was shooting for the 200-400 double, made possible when Olympic organizers changed the schedule after a request that originated in the United States.

She made the 400-meter final, but in her signature event – the one where she was hoping to defend her Olympic title – she could not make it through.

Prandini will be joined by Tori Bowie and Deajah Stevens, who finished 1-2.

The Felix loss overshadowed a performance by Sydney McLaughlin, who finished third in 400-meter hurdles to become the first 16-year-old to make the U.S. Olympic track team in 40 years.