Andrew Selby won a five-round flyweight war with his great rival Michael Conlan as the British Lionhearts maintained their unbeaten home record with a shut-out 5-0 win over the US Knockouts in Bethnal Green.
The Welshman clinched a 49-46 (twice) 50-45 verdict over Ireland's Olympic bronze medallist in a thrilling bout which showcased the ferocious instincts of both fighters in a professional setting.
Selby had missed his chance of an Olympic medal when he was beaten by the brilliant Cuban Robeisy Ramirez Carrazana in the quarter-finals in London - the same man who also forced Conlan to settle for bronze.
Selby said: "It's great to beat a guy who won a medal in London. I beat him by a point in the Worlds in 2011 so he had unfinished business with me tonight, but I proved myself and came out on top.
"Since the Olympics it was always my plan to keep busy and the WSB has been great for that. It's good money and I'm getting a fight regularly so it's definitely something I want to stick with at the moment."
Selby's body shots shaded the all-action opening round and a flashy shuffle in the second underlined his fine start. But Conlan was matching him for speed and swung back with a wide right hook to end the round.
Selby's speed carried him through a more difficult fourth as the Belfast man waded forward, but after more frantic action in the fifth there were no complaints with the clear verdict in the Welshman's favour.
Olympic silver medallist John Joe Nevin scored a unanimous points win over tough Frenchman Daouda Sow. Sow, who also clinched Olympic silver four years earlier in Beijing, gave Nevin some problems on his way to victory.
Another Irishman, Joe Ward, shut out Croatia's Marko Calic for a 50-45 win at light-heavyweight and in the night's last fight, London heavyweight Joe Joyce also beat Avery Gibson of the US on points.
Estonia's Kaupo Arro had got the Lionhearts off to a winning start by scoring a second round technical decision over American Jeffrey Camp after Camp was ruled out due to a bad cut over his right eye in round two.