Katie Ledecky sealed up her fourth gold medal in Rio on Friday night, winning the 800 meter freestyle in her second straight Olympic Games and posting a new world record.
Her time of 8:04.79 broke her own world record mark of 8:06.68, in her final race of the Rio Games.
Ledecky entered as the runaway favorite and world record-holder in the event. She narrowly missed setting the world record in London in 2012.
On Thursday, Ledecky set an Olympic record with a time of 8:12.86 in her preliminary round heat. In that race, she was seven seconds ahead of the next competitor.