( CNN ) -- Wladimir Klitschko will take a hefty weight advantage into his world heavyweight title unification match against David Haye in Hamburg Saturday . The Ukrainian tipped the scales at 17st 4lb , while Britain 's Haye came in at 15st 2lbs , over two stones lighter . Haye , a former cruiserweight champion , will be putting his WBA title on the line while Klitschko defends the IBF and WBO versions of the world crown . The 30-year-old Haye will be two pounds heavier than for his last fight against fellow Briton Audley Harrison , while Klitschko is five pounds lighter than for his previous bout against Samuel Peter . Haye was supported by a large British contingent who have gathered in the Geman port city for the fight in the Imtech Arena used by Bundesliga side SV Hamburg . Despite a 25-1 record , Haye is rated an underdog against the giant Klitschko , whose brother Vitali holds the WBC version of the title . But he was in typically bullish mood as he addressed reporters after the weigh-in . `` I 'm so proud to be involved in it and for the guy that knocks the other unconscious it is going to be a great feeling , to be the main man , at the pinnacle of the heavyweight division . `` I believe being the unified heavyweight champion is the pinnacle of the sport and I 'm looking forward to going in there and claiming my rightly-deserved titles , '' he said . Klitschko , who has a record of 55 wins , 49 knockouts and three knockout defeats , said it was `` time for the talking to end . '' He will take height , reach and weight advantage into the eagerly-awaited fight which will be watched by over 50,000 in the football stadium with big television audiences in Britain and Germany , where both the Klitschko brothers have a devoted following .
David Haye takes big weight advantage into title match against David Haye . Klitschko weighs in more than two sets heavier than Haye . Klitschko defends IBF and WBA crowns while David Haye has IBF heavyweight title . Sell out crowd of over 50,000 for Saturday 's bout in Geman .