What to watch in primetime on NBC: Day 9

Michael Phelps tries to win a sixth Rio medal in primetime Friday night on NBC at 8 p.m. ET/PT, plus track and field action heats up.

ET/CT users: Watch the stream here at 8:00 p.m. ET / 7:00 p.m. CT

MT users: Watch the stream here at 7:00 p.m. MT

PT users: Watch the stream here at 8:00 p.m. PT

Usain Bolt runs to three-peat as world’s fastest man

In live coverage (ET/CT) of track and field, Jamaican sprint sensation Usain Bolt attempts to become the first man to win three Olympic titles in the 100m; among his rivals is the Athens 2004 gold medalist, Justin Gatlin of the U.S. Also on the track, American LaShawn Merritt seeks a return to the 400m podium after his 2008 triumph.

Watch track finals live here

Simone Biles goes for gold No. 3

In apparatus finals of gymnastics, U.S. contenders include Simone Biles on women’s vault.

Watch gymnastics apparatus finals here

Kerri and April look to advance to the semis

A women’s beach volleyball quarterfinal (live ET/CT) features Kerri Walsh Jennings’ pursuit of a 26th consecutive Olympic win and fourth Olympic gold with new partner April Ross.

Watch beach volleyball action live here