"Get up! Get up! We have to finish!" D'Agostino told Hamblin as she laid on the track, according to ESPN. "This is the Olympic Games! We have to finish this."
Once Hamblin was back on her feet, the two women continued the race. The two were dead last in the race, but determined to cross the finish line.
ESPN reports D'Agostino hurt her knee in the fall, and was running slowly.
When Hamblin looked back to see if she could help, D'Agostino encouraged her to continue on.
"Keep going, keep going," D'Agostino called out.
D'Agostino finished last and Hamblin finished next to last. After crossing the finish line, the two runners embraced.
"I'm so grateful for Abbey doing that," Hamblin told reporters after the race. "That girl is the Olympic spirit right there."
U.S. Track and Field announced on Twitter Monday morning that they protested the finish and D'Agostino will be advancing to the 5,000 meter final on Friday.