Lennox Lewis fears David Haye is facing an 'uphill struggle' in Saturday's heavyweight showdown with Wladimir Klitschko.
Klitschko will enjoy a major size and weight advantage when he battles Haye in this weekend's heavyweight unification fight, live on Sky Box Office HD.
And Lewis also feels Wladimir will benefit from the expert advice offered by his old trainer Emanuel Steward.
But the former world champion still believes Haye is capable of cancelling out Klitschko's strengths with his own speed and punch power.
"When you look at it on paper and you see Wladimir, he's the natural heavyweight," Lewis told Sky Sports News. "He's bigger, he weighs more, plus he has a great trainer in his corner.
"Plus he fights in his hometown, you know his home country and for David he has an uphill battle.
"But if there's a fighter that can do it in this era it's David Haye. He's got the speed, he's got the stamina, the quickness to be able to do it and the power.
"Wladimir's chin has been hit before and he has gone down before and I know David knows that and is going to try and expose that."
