Today's Highlights: Ashton Eaton starts quest for decathlon gold; US men's basketball vs Argentina

Olympics Viewer Guide, Aug. 17, 2016

Today's Highlights

NBC Daytime

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Canoe and kayak sprints started at 8 a.m.

The decathlon began. USA's Ashton Eaton tries to become just the third man to repeat as Olympic decathlon champ. Watch the daytime Track & Field events here.

Evan Jager tried to stop the Kenyans in the steeplechase to give the U.S. its first medal in the event since 1984.  

The US men's volleyball team played Poland in the quarterfinals at 1 p.m.

NBC Primetime

Live coverage includes the women's long jump final featuring world champion Tianna Bartoletta and defending gold medalist Brittney Reese - both from the U.S.

First-time Olympian Torie Bowie competes in the women's 200m and a trio of American women go in the 100m hurdles.

Usain Bolt will run his semifinal heat in the 200m.

Ashton Eaton finishes Day 1 of the decathlon with one of his best events: the 400m.

US men's basketball played Argentina in the quarterfinals at 5:45 p.m.

Taekwondo - 7 p.m. - Watch here. 

Women's beach volleyball finals - 11 p.m. - Watch here.

Flint's Claressa Shields, the defending gold medalist in the 75 kg category, fights at 1:30 p.m. The fight will air on NBCSN on Wednesday evening, or you can stream it here live. 

Livestreams

Cable subscribers can stream the Olympics live on mobile devices using these links: 

WATCH LIVE: Primetime coverage starting at 8 p.m.

WATCH LIVE: Late-night coverage starting 12:35 a.m.

Here is the full TV schedule for the Olympics.