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The official announcement will be made in the next few days and Khan has already pulled out of his challenge to world welterweight champion Devon Alexander, scheduled for December 7 in New York, to ensure that his dream fight with Mayweather is not jeopardised.
Khan is being given this opportunity of a lifetime thanks to a conviction in America that his exceptional speed will present a unique test to Mayweather, who has dealt imperiously with all threats from bigger and supposedly stronger foes.
Stephen Espinosa, head of sports for the giant Showtime cable TV network which bankrolls both men, says:
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