DeSoto's Errol Spence Jr. stepped into the ring Sunday against Brazil's Myke Ribeiro de Carvalho in his first bout in the Round of 32 at the 2012 London Olympic Summer Games.
Men’s bouts take place over three rounds of three minutes each. Boxers score points for every punch they land successfully on their opponent’s head or upper body.
The southpaw had a 5-3 lead after the first round, he lead the second round 7-4, he took the third and final round 4-3 with a final score was 16-10.
"I just believed in myself and picked up my pace, and took the momentum away from him," said Spence in a post-bout interview. "But I was a little rusty and a little nervous as I started out."
Spence's win made it 4 for 4 for Team USA Boxing.
Spence is the top-ranked amateur welterweight in the country, and fifth-ranked in the world.
Next up Krishan Vikas of India on Friday on CNBC.