World heavyweight boxing champion Vladimir Klitschko was made to go the distance against Polish challenger Mariusz Wach but earned a unanimous points decision in Hamburg to retain his four title belts.
The 36-year-old Ukrainian, who holds the IBF, IBO, WBO and WBA crowns, was never seriously troubled by the 32-year-old who saw his unbeaten record snap after 27 wins in 27 fights.
Klitschko, who improved his record to 59 wins from 62 fights, had pinned Wach to the ropes in the eighth but failed to knock him down.
The three judges gave Klitschko a 120-107, 120-107 119-109 victory.
