Wladimir Klitschko has shrugged off suggestions that his heavyweight world title defence against Jean-Marc Mormeck will be one-sided in his favour.

The 39-year-old challenger has fought only three times at heavyweight after he moved up a division in 2009.

"I'm expecting a tough challenge, at least at the start," Klitschko told reporters ahead of Saturday's fight in Dusseldorf.

"Maybe it looks simple and one-sided for you guys, but it's demanding a lot of work and concentration and you have to be right on the ball.

"If our fights were kind of sloppy and we were getting punched in the face, probably that would be exciting for the fans."

The Ukrainian is putting his WBA, IBF and WBO belts on the line in Germany.