Ricky Hatton has relinquished the WBA welterweight title he claimed from Luis Collazo in May.
Manchester's Hatton is still undefeated in 41 pro encounters
Hatton now has the chance to fight Jose Luis Castillo in a light-welterweight bout planned for early next year.
Before that, the Manchester fighter will be looking to win back his IBF crown from Juan Urango on 6 January.
"We're after Ricky's old title. But the defining fight we want is the one against Castillo," said Hatton's promoter Dennis Hobson.
Hobson added: "We have already opened talks with Castillo's promoter Bob Arum and we are confident we can make that fight for around April time. Ricky is in a very lucrative position at the moment."
Hatton gave up his IBF light-welterweight title in April, which he won by beating Kostya Tszyu, in order to move up a division.
The 27-year-old is expected to win back his old crown and set up a potentially lucrative contest against Castillo.