Nathan Adrian wins 50 semi heat

Nathan Adrian smiles after winning the mens 100-meter freestyle final at the U.S. Olympic swimming trials, Thursday, June 30, 2016, in Omaha, Neb. (AP Photo/Mark J. Terrill)
Nathan Adrian smiles after winning the mens 100-meter freestyle final at the U.S. Olympic swimming trials, Thursday, June 30, 2016, in Omaha, Neb. (AP Photo/Mark J. Terrill)

Nathan Adrian came back from a late night to win his heat in the 50 meter freestyle Friday morning.

After qualifying for his third Olympics Thursday night, winning the 100 free and giving himself a shot at defending his 2012 gold medal, Adrian touched the wall in 21.96 — good enough for fourth place. He is the American record holder in the event in 21.37.

The semifinals begin at 5 p.m. local and can be seen at nbcolympics.com or on tape delay at NBC at 8 p.m.