Carl Froch has backed fellow Briton David Haye to upset Wladimir Klitschko in next month's mouthwatering heavyweight unification clash.
WBO and IBF champion Klitschko has vowed to make Haye the 50th opponent he has knocked out in a 15-year professional career, which boasts 55 wins in 58 fights.
However, Froch believes WBA holder Haye can upset the odds in Hamburg on 2 July.
"If David catches him early then he will flatten him - it's a long shot but David is an excellent boxer, he can fight and he can box," said super middleweight champ Froch.
"Speed is going to be a big factor in this fight. Klitschko is big and strong but he is also a little bit clumsy and cumbersome - what is he 17-18 stone? He is a big lad.
"If David has that speed, well speed can win fights. Speed and timing is your power. I think he will come in around 15 stone. He won't want that leaking out just yet though!
"This is the biggest fight of his career, in David's mind he knows he is in deep water so he needs to be at his best. I know he is mentally tough, physically fit and I am confident he will do the job, I really am."