DUSSELDORF, GERMANY - Wladimir Klitschko easily retained his heavyweight belts Saturday with a fourth-round stoppage of Jean-Marc Mormeck.

Klitschko (57-3) had no real trouble against a foe with a recognizable name but no real shot to win.

He was originally slated to fight Mormeck (36-5) on December 10, but the bout had to be rescheduled after Klitschko had kidney stone surgery.

Klitschko remained unbeaten in his last 15 fights and retained his WBA, IBF and IBO belts.