The Great Britain Lionhearts beat the USA Knockouts 4-1 in their debut appearance at the World Series of Boxing in California.
Anthony Fowler, Joe Cordina, Uaine Fa and Sean McGoldrick all won their respective bouts.
Lee Pullen, of the GB coaching team, said: "It was a very good night for the team. The boxers adapted superbly to the different demands."
GB now face Italia Thunder at the Celtic Manor Resort on 23 November.
Olympic silver medallists Fred Evans, John Joe Nevin and world number one Andrew Selby all fight.
Earlier this month, the British franchise announced it would compete in the Amateur International Boxing Association's (AIBA) event for the first time.
WSB involves nation-based franchises, in two groups of six, competing against each other over the course of a season. Boxers compete as professionals but retain their Olympic eligibility, while also being allowed to compete in World and European championships, Commonwealth Games and other traditional events.