Devin Haney claimed a unanimous points victory over Regis Prograis to secure the WBC light-welterweight title in San Francisco.
American Haney dominated his compatriot and knocked him down in the third round, with all three judges scoring the bout 120-107 in Haney’s favour.
It was Haney’s first fight at 140 pounds, having previously been the undisputed lightweight champion.
“I felt so much stronger – 140 got a new king,” Haney, 25, said.
Haney vacated his 135-pound WBC, WBA, IBF and WBO belts in November to move up a weight class.
He now holds a 31-0 record, including 15 knockouts, while the loss was Prograis’ first since October 2019.