In swimming, American Caeleb Dressel has won his fifth gold medal at this Olympics, and is only the third swimmer in history to win three golds in individual events, matching Michel Phelps and Mark Spits.
Dressel won the 50-meter freestyle final on Saturday night with an Olympic record of 21.zero-7 seconds.
He's had two golds in relay events to round out the five in total.
In the women's swimming, Australia's Emma McKeon won gold in the 50-meter freestyle, her seventh medal of this Olympics, which is the most of any female swimmer in history.
Still to come tonight, one of the highlights of the athletic events the men's 100 meter, when we'll find out who's the fastest man on land.
The semifinals are this evening, starting at around 7:15 PM, Korea time.
It's a diverse line-up from more than a dozen countries.
The final is at 9:50.
The Olympic record holder, Usain Bolt, is not competing this time, but they'll be eyeing his record of 9.6-3 seconds.