British Lionhearts guaranteed a place in the World Series of Boxing play-offs after inflicting a first defeat of the season on Astana Arlans of Kazakhstan.
Croatian Hrvoje Sep gave Kazakhstan an early lead at London's York Hall with a points win over Swede Babacar Kamara.
England's Sam Maxwell levelled the contest before Welsh Olympians Fred Evans and Andrew Selby won their bouts to put the Lionhearts into a 3-1 lead.
Unbeaten Joe Joyce defeated WSB champion Filip Hrgovic to make it 4-1.
The result moves the Lionhearts a step closer to winning the one million euro first prize and is revenge for last December's 5-0 defeat in Almaty.
Unbeaten at home, the team lie third in Group B and have two bouts remaining, away to Germany on 23 February and home to Ukraine at York Hall on 1 March.
Of the two groups of six franchised teams, the top four from each group go through to the quarter-finals, which are staged over two legs next month.
Rob McCracken, performance director of the British Lionhearts said: "That was very good win against an extremely tough Kazakhstan team.
"We still have a couple of hard fixtures to go against Germany and the Ukraine but we have every right to feel confident as we look towards the next phase of the competition."