Promoter Frank Warren has warned heavyweight rivals Audley Harrison and Danny Williams there must be no repeat of last year's 12-round bore when the pair clash again at London's ExCel Arena on Saturday.

Harrison and Williams laboured through 36 dreadful minutes of sustained non-combat at the same venue last December before the Brixton man got the nod via a split decision.

Warren has had no alternative but to bump their rematch up to top of the bill status following Scott Harrison's withdrawal from his WBO featherweight title defence - but he has done so with reservations.

Warren said: "It is redemption time. Nothing is acceptable other than an exciting fight with both of them giving 100 per cent. They have got to deliver and there can be no excuses.''

Warren had to dig deep into his pocket to tempt Williams into the fight at one week's notice, following the withdrawal of Commonwealth champion Matt Skelton due to injury last week.

Betterbet.com make Harrison marginal favourite at 4-6. We think that looks right on the basis that none of Williams' fights over the last two years has suggested he has fully recovered from the sustained beating he took from Vitali Klitschko in a world title challenge Las Vegas in December 2004.