Jack Williams competes in the men’s recurve team final at the 2021 World Archery Championships on September 24, 2021 in Yankton, South Dakota.

The rift between Brady Ellison and Jack Williams was wide heading into their gold medal match Thursday in the Archery World Cup Final, but the match was decided by the tiniest of margins as Williams upset his American teammate in a play-off for his first career title.

Ellison, the world No.1 chasing his sixth World Cup title, took a 4-0 lead after two sets over No.11 ranked Williams and looking for his first World Cup victory. But Williams slowly recovered his way into the game, hitting three 10s in the fifth set and forcing a play-off. It took a 10 more to get the surprise, the first major international title for the 21-year-old from Chula Vista, Calif.

The victory crowns the best season yet for Williams, who only started archery at the age of 14. He then made his Olympic debut in Tokyo, competing both individually and as a team with Ellison and Jacob Wukie. Williams won team gold and an individual bronze medal at the 2018 Pan American Championships.

On the women’s side, Casey Kaufhold and Mackenzie Brown each fell in the quarterfinals. In the non-Olympic compound division, Braden Gellenthein of the US team finished second and Kris Schaff third in the men’s individual competition.