This past Saturday night in London, heavyweight contender Dave Allen picked up the biggest win of his career when he knocked out former WBA champion Lucas Browne in the third round with a big body shot.

The victory now sets the stage for Allen to pursue much bigger opportunities in his division.

Former world champion George Groves wants to see Allen, 27-years-old, change his career around in full force - by taking things as serious as possible.

Allen is already working much harder in the gym, with former IBF junior middleweight champion Darren Barker helping him polish his skills.

"Boxing is a serious sport, I want fighters to take it seriously. I think Allen, maybe it's down to self-belief that he doesn't take the game seriously. I hope now that he does, I hope that he gets a taste for it here today, because there's good fighters out there that work really hard and never have the opportunities that he's got," Groves told Sky Sports.

"He's done the job, he boxed great, I will take nothing away from him tonight, but this shouldn't be his highest moment. So far in his career, great, but now he's talking about it, 'what next?'. That's the most important thing, he should now be striving for something better, he should be striving to improve.

"Let's get serious, let's see your full potential, because otherwise you're going to look back in years and go, 'I blew it, I didn't get what I deserved out of it'. He's a fantastic story-teller, he's funny, he's engaging, that's why he's going to be popular. If he can fight as well, who knows what he can do."

Another former world champion, Carl Froch, would like to see Allen match skills with David Price.

"The David Price fight, for me, that would be a good gauge, and something that everyone could get excited about," Froch said.