Allyson Felix and the U.S. women's 4x100 relay team made the most of their second chances.
A day after they qualified for the final by re-running a heat in which a jostle from another runner caused a dropped baton, the United States ran away with the gold medal. English Gardner took a clean handoff from Felix this time and turned over a lead to anchor Tori Bowie, who blazed home in 41.01 seconds.
Felix got the gold medal that eluded her Monday night, Shaunae Miller lunged across the finish line to deny her in the individual 400 meters. She has five Olympic gold medals in track and field, more than any other woman.
Meanwhile, Usain Bolt on Friday picked up his third Rio gold, and ninth Olympic gold, as part of Jamaica's 4x100-meter relay team. Japan earned silver while Canada got took bronze. The United States finished in third but was disqualified for an early handoff between Mike Rodgers on the first leg and Justin Gatlin on the second.
Bolt has never lost an Olympic final and finished off his "triple triple," sweeping the 100, 200 and 4x100 relay in three straight Games.
The U.S. defended its 2012 Olympic title against 2015 world champ Jamaica, which had sprint double winner Elaine Thompson. Jamaica took the silver and Great Britain earned bronze.
Kenya's Vivian Cheruiyot won the women's 5,000 meters in an Olympic record of 14 minutes, 26.17 seconds, followed by teammate Hellen Obiri. Ethiopia's Almaz Ayana, who won the 10,000 meters, took a big early lead but got caught and settled for bronze. American Shelby Houlihan was 11th.
American Abbey D'Agostino was on the entry list, but didn't run. Her chain-reaction tumble with New Zealand's Nikki Hamblin led to a moment of sportsmanship, when she helped Hamblin up to finish. Officials put them both in the final that starts at 8:40 p.m. but D'Agostino tore ligaments in her knee and is done for the season.
American pole vaulter Sandi Morris won silver in the pole vault behind Greece's Ekaterini Stefanidi. Eliza McCartney of New Zealand won bronze.
American Jenn Suhr, who has been ill for a week, early and finished in a tie for seventh after jumping 4.60 meters.
"They think it's respiratory and now in the lungs. This morning I was coughing up blood," the 34-year-old Suhr told The Associated Press. "It's getting scary."
Suhr said she vomited twice during Friday night's pole vault and began crying as she discussed how she trained for four years for a repeat gold but is feeling sicker than she's ever felt in her life.
"I just want to get out of here and go home and figure it out."
Dilshod Nazarov of Tajikistan won the men's hammer throw ahead of Ivan Tsikhan of Belarus and Wojciech Nowicki of Poland.
On Friday morning, medals were awarded in the men's 50km race walk. Matej Toth of Slovakia captured gold, Australia's Jared Tallent won silver and Evan Dunfee of Canada got the bronze medal.
In the women's 20km race walk, China's Liu Hong to the gold, Mexico's Maria Guadalupe Gonzalez won silver and Lu Xiuzhi won bronze.