Frank Warren signs George Groves

Super middleweight prospect George Groves went up against one of British promoter Frank Warren's best up-and-comers and won in his last fight.

Next time out, Groves and Warren will be on the same side.

Warren announced that he has signed Groves, the British and Commonwealth champion, to a three-year promotional contract.

Warren and Groves were on opposite sides May 21 when Groves scored his biggest professional victory.

In a heavily hyped showdown, Groves retained the Commonwealth title and won the British title on a tightly contested majority decision against the Warren-promoted James DeGale, a 2008 British Olympic gold medalist, who was favored to defeat Groves.

"I'm very happy that George has chosen to come under my promotional banner and we will now be involved in some big fights," said Warren, who has promoted virtually all of the top British stars in of the past 25 years. "He's a good fighter and the last fight against James DeGale was the first time I had worked with him.

"Of course, everyone is asking about a return with James, who I represent, and it is an obvious fight that will definitely happen again. The last fight was very close and a few observers felt that it could have gone either way. One thing's for sure -- the public will want to see it again. It's a big domestic rivalry that will become ever bigger."

England's Groves (13-0, 10 KOs), 23, who also defeated DeGale in an amateur fight, had been promoted by Hayemaker Promotions, the company that belongs to former heavyweight titlist David Haye. But his company is far less active than Warren's. Groves figures to be far busier fighting under Warren's banner.

"Having sat down with (trainer and manager) Adam Booth (who runs Hayemaker) and discussed at length what was the best move for my career and fighting to progress towards a world title, we agreed that everything that Frank put to us made perfect sense," Groves said. "He is the most experienced promoter in Britain, by far, and we feel has the experience and ability to take me to the very top. Exciting times ahead."

Booth, who also trains and manages Haye, will remain in those roles with Groves.

"On the surface, this may seem a strange decision from me and Hayemaker to have made, but this is all about what is best for the career of George and we believe that working with Frank is the best decision we could have made," Booth said. "George has the full support of both myself and David Haye as we know that if anybody can take George to the top, Frank is the man."

Warren has not yet announced when Groves' next fight will take place.

Dan Rafael covers boxing for ESPN.com. Follow him on Twitter.