Evander Holyfield is convinced that neither size nor age will matter in Saturday's showdown with WBA heavyweight champion Nikolai Valuev.

The 46-year-old challenger is determined to become the oldest heavyweight champion in the history of boxing when he takes on "The Russian Giant" in front of a sell-out crowd of 12,500 fans in Zurich.

In order to put his name in the record books, though, he needs to defeat the biggest and tallest champion of all time.

"I will display a performance that will surprise many people," Holyfield said at Wednesday's official press conference.

"I have been asked about my age so many times but that is fine.

"It is not about how old you are. It is about how old you feel and what you can do inside the ring.

"I am very experienced and I know what I have to do against Valuev. I am in great shape and I really look forward to Saturday night."

Valuev will make his second appearance in Switzerland after stopping Jameel McCline in the third round of their meeting in January 2007.

"It is great to be back in Switzerland," Valuev said.

"It is a great country and the people are very nice. It is something very special to fight an accomplished champion such as Evander Holyfield.

"He is a living legend and I am full of respect for him. However, once you are inside the ring, neither names nor titles, matter any more.

"I have trained very well and I will put on a good performance on Saturday night."