Carl Froch's top target is Andre Ward as he is determined to avenge a points defeat by the American in 2011.
Having beaten Mikkel Kessler on points in May, Froch is keen to make amends for the only other blemish on his record, but British great Joe Calzaghe would back Ward for a repeat win.
When asked about a rematch, he said: "Very difficult because I don't think Carl can adapt.
"I think Carl fights one way and that's that. Some fighters can't adapt much and I think a good boxer always beats a good fighter. I think he's an exceptional fighter, Andre Ward.
"He's not my cup of tea to watch, but he's very very clever. He moves well on his feet, he's got good hand speed, he's elusive and he's pretty good on the inside as well, so it will be very very difficult.
"He'll have to change something. He will have to go at him at the opening bell. What I would say about Andre Ward, he seems to tire late in fights, so that's the one thing I can say.
"If he stays on him from the opening bell and tries to pressure him and drag him into a war that will be his best chance. But I think Andre Ward's very clever and will probably see that coming."