The men's 4x100m relay finals will feature the last time we'll have an opportunity to watch Usain Bolt race in the Olympics.
Bolt has confirmed he plans to retire after the 2017 World Championships in London, so the 2020 Olympics in Tokyo are not in the cards for the world's fastest man. Bolt has already won gold in the men's 100m, finishing in 9.81 seconds and making it look easy. Bolt struggled with injuries this year and there was even talk heading into these Games that American sprinter Justin Gatlin might be able to edge him out, but that didn't happen. Instead, Bolt won, and he won easily.
There's one more opportunity to see Bolt making 100m look easy, and NBC Sports will stream it live starting at 7:10 p.m. ET on Friday.
Team USA's Jordan Burroughs is the reigning Olympic champion in the 74kg weight class, and he will compete for another gold on Friday. Burroughs has only lost one match since his win in the London Games, and he wrestled that match with a sprained MCL. He's favored to take gold again, and you can watch it via live stream on Friday at 3 p.m.
Key events for Friday, Aug. 19
All times Eastern. Click sport name for stream info.
Track and Field: Men's 50km race walking final
Equestrian: Individual jumping finals
Badminton: Women's singles, men's doubles medal matches
Water Polo: Women's bronze medal match
Synchronized Swimming: Teams technical routines final
Field Hockey: Women's bronze medal match
Soccer: Women's bronze medal match
Cycling: Men's and women's finals
Boxing: Women's lightweight gold medal match
Track and Field: Women's 20k race walking final
Water Polo: Women's gold medal match
Wrestling: Men's freestyle 57kg and 74kg repechage and medal matches
Field Hockey: Women's gold medal match
Soccer: Women's gold medal match
Modern Pentathlon: Women's combined (running and shooting) medal event
Taekwando: Women's and men's repechage and medal matches
Track and Field: Women's pole vault final, men's hammer throw final, women's 5000m final, 4x100m final
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