Also on Saturday, in sprinting, a new Olympic women's record from Jamaica's Elaine Thompson-Herah, who is taking home gold in the 100 meters.
She beat the record held by the legendary Florence Griffith Joyner by one one-hundredth of a second with a time of ten.6-1 seconds.
The silver and bronze went also to Jamaican women.
Today, the action continues in athletics and the highly anticipated men's 100 meter.
The semifinals are this evening, starting at around 7:15, Korea time.
It's a diverse line-up from more than a dozen countries.
And we'll see who is the fastest man in the world in the final tonight at around 9:50 PM, Korea time.
The Olympic record holder, Usain Bolt, is not competing this time, but they'll be eyeing his record of 9.6-3 seconds.