Olympic champion Athing Mu's hopes of defending title dashed after tumble at US trials, appeal denial

American runner Athing Mu entered Monday's U.S. Olympic track and field trials with hopes that she would qualify for an opportunity to repeat as an Olympic champion.

But a surprising fall during the two-lap race brought those hopes to a screeching halt. Mu, who was a member of the gold-medal team in the 4x400 at the Tokyo Games, lost her footing after she got tangled in a pack of runners and stumbled to the ground.

The amount of ground that Mu lost due to the fall was ultimately too much for her to overcome...