Manny Pacquiao is set to return to the ring with a fight against Timothy Bradley in Las Vegas on 9 April, according to promoter Bob Arum.
Pacquiao, 37, has not fought since he was convincingly beaten on points by Floyd Mayweather in May.
Arum claims the Filipino's fight against WBO welterweight champion Bradley, 32, is a "done deal".
The pair have fought twice before, with Bradley victorious in June 2012 and Pacquaio winning in April 2014.
Arum claims he has agreed deals with both fighters, though the paperwork for the bout has yet to be finalised.
Britain's Amir Khan had been hoping to fight six-weight world champion Pacquiao.
"They didn't feel Khan would do anything," Arum told the Los Angeles Times.
"He has a spotty record, hasn't done great ratings. Why would we feel he'd do well on pay-per-view?"