Nathan Cleverly remains hopeful that Carl Froch's fight with Mikkel Kessler tonight can be the springboard to an all-British light-heavyweight showdown.
Froch will put his IBF super-middleweight belt on the line in tonight's rematch with WBA title-holder Kessler, who beat him by unanimous decision after a memorable battle in Kessler's native Denmark.
Should Nottingham fighter Froch win and decide to step up a weight division, WBO champion Cleverly would await as a potential opponent.
And the Welshman told BBC Radio Five Live: "In that super-middleweight division, any one of those guys could potentially move up to the light-heavyweight division, it's only 7lbs difference.
"We could potentially fight each other one day so really, we're rivals as such.
"He's just said he's happy staying at his weight and that he's not big enough to move up. That's his choice but obviously it'd be a great fight if it ever was to materialise."
Cleverly has inside information on the build-up to tonight's fight, having travelled to Scandinavia to spar with 34-year-old Kessler, and he expects another hard-fought encounter.
"People don't know which way to go, it's a 50-50 fight," he said.
"The first fight was an excellent toe-to-toe battle so this could be very similar.
"I've got quite a strong idea, I've been out in Denmark sparring with Mikkel Kessler, helping his preparation. It was a great experience, we had some good sparring."