Vitali Klitschko is in the final preparations to defend his WBC heavyweight championship against Cuban Odlanier Solis.
The Ukrainian is undefeated in his last nine bouts, seven of which have seen him successfully defend his title, with his last defeat coming at the hands of Lennox Lewis in 2003.
"I am ready, self-confident and I will once again prove my strength in the boxing ring," Klitschko said.
"There is a reason why I have the same belt Muhammad Ali had many years ago."
"Today I once again meet an Olympic champion, a three-times world champion, an experienced guy: young, hungry and still unbeaten as a professional. I am fully convinced that the fight will be very interesting."
Solis, who beat Haye at the World Amateur Championships ten years ago, is confident of upstaging his more-fancied opponent in Cologne on Saturday.
"I will win in the 12th round," Solis said. "If it happens sooner, all the better, then I'm happy. But in any case I will win."