Britain's Ricky Hatton will face former world lightweight champion Jose Luis Castillo in Las Vegas on 23 June.
The pair will fight for the nominal IBO light welterweight belt but mastery of the 147lbs division is the real prize.
"You become a great fighter by fighting great fighters and Jose is one of them," said the 28-year-old Hatton.
"I am so excited about this fight and I am living my dreams by topping the bill in Las Vegas again. This fight does not need anyone to sell it."
The much-anticipated contest will be staged at the 17,000-capacity Thomas and Mack Center.
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