Jordan Wilimovsky’s journey at the Rio Olympics concludes Tuesday morning when he swims in the 10k marathon open water swim.

Wilimovsky is the defending world champion in the event after he took the crown last year at World Championships in Kazan, Russia. He has already had a grueling Olympics and faces a very short turnaround from his previous event, the 1500m freestyle. Wilimovsky made it through heats, qualifying third with a then-personal best. Then on Saturday night, he further lowered his personal best but fell just short of the podium, coming in fourth.

Fewer than 72 hours after climbing out of the pool, Wilimovsky will make U.S. Olympic history, becoming the first male Olympian in the country’s history to swim in both pool and open-water competitions in the same Olympic Games. Here is the list of swimmers.

Here’s how you can watch Wilimovsky, who will be a redshirt senior at Northwestern when he returns to Evanston in the fall.

BROADCAST INFORMATION

TV channel: NBC Sports Network*

Start time: 7:00 a.m. CT

Online streaming: nbcolympics.com

Mobile: NBC Sports app

Betting info: Wilimovsky is the favorite at 11/4.

*Television coverage will cut away for significant portions of the race, as it takes over two hours.