Webb was in control from the first round against ConcepcionBritish light middleweight champion Sam Webb defended his title with an 11th round knockout of Leicester's Martin Concepcion at The Troxy in London.
The swift Webb dominated the early exchanges but, sensing a points defeat, the powerful Concepcion abandoned his cautious tactics in pursuit of victory.
However, Webb's class shone through and an explosive right-hander floored his opponent, the Midlands area champion.
After the win, Webb expressed his pride at "proving his doubters wrong".
"I know a few people don't think I'm the best light middleweight in the country and I don't claim to be," added the 29-year-old Londoner.
"But I'm definitely up there with Ryan Rhodes. He's the best in the division but I'm right on his heels."
Gavin Rees has lost just one of his 34 fights since his 1998 pro debutFormer world champion Gavin Rees has been handed a British lightweight title shot against unbeaten John Watson.
Munroe last fought in April, stopping Mexican Victor Terrazas Leicester super-bantamweight Rendall Munroe says his size may give him the upper hand in his WBC title bout against Toshiaki Nishioka in Japan.