WATCH LIVE: Men’s 100 free, women’s 200 butterfly heats

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Tuesday means another busy day at the pool, beginning at Noon Eastern with the men’s 100 meter freestyle heats. The United States has two competitors in the event, with Nathan Adrian and Caeleb Dressel both swimming in heat seven. Dressel and Adrian have already won gold in these Olympics, as they were part of the 4×100 freestyle team. Other swimmers to watch in the 100 free include Australia’s Cameron McEvoy and Kyle Chalmers, and Italy’s Luca Dotto.

Among those competing in the women’s 200 butterfly is Hungary’s Katinka Hosszu, who has already won two gold medals in these Olympic Games. The United States will have two swimmers in this event, with Natalie Adams swimming in heat three and Hali Flickinger in heat four. Australia’s Madeline Groves and Japan’s Natsumi Hoshi are among the other swimmers in the event expected to contend for a medal.

WATCH LIVE: Men’s 100 freestyle, women’s 200 butterfly, men’s 200 breaststroke, men’s 4×200 freestyle relay preliminary heats — 12 p.m. Eastern

Two Americans are among the contenders for medal’s in the men’s 200 breaststroke in Kevin Cordes and Josh Prenot, with both swimming in the fifth and final qualifying heat. Also in the field is reigning Olympic champion Daniel Gyurta, who holds the current Olympic record and will be swimming in heat three, and reigning world champion Marco Koch of Germany will swim in heat four.

The semifinal heats of the men’s 4×200 freestyle relay will be held during the afternoon session at the pool as well, with the United States looking to win a fourth straight Olympic gold medal in the event. The Americans should qualify for the final; the only question is how much different their lineup will look for the final.