By Mark Vester

Former undisputed heavyweight champion Mike Tyson says the size advantage of WBA hevayweight champion Nikolai Valuev doesn't matter in Saturday's fight with David Haye. Tyson says the 7'2 framk of Valuev won't play a major role. Tyson was one of the shortest heavyweight champions of the last few decades and beat a lot of taller fighters but none of them were ever as big as Valuev.

"It's not necessarily the size of the guy; it is basically the spirit, the competitiveness in his heart," Tyson told Sky News.

"If the guy wants to fight he can be 4ft 2 and still fight a guy at 6ft 9. If you want to fight you're going to fight and you're going do well. It's just the average of the law in the sport of boxing. It depends on Haye's psychological opinion of the other fighter. It's all about the fighters' psychological opinions. If this guy feels this guy is beatable, he's beatable."

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