Kell Brook is already targeting a bout with WBA and WBC welterweight champion Keith Thurman after his impending match-up with Errol Spence.
Thurman (28-0) took the WBC belt from Danny Garcia with a split points decision in New York on Saturday.
The American is now in the sights of IBF champion Brook, whose upcoming fight against the unbeaten Spence - the mandatory challenger to his title - is yet to have a date confirmed.
"Garcia and Thurman are both very good champions and it was very hard to split them but I thought Thurman would win the fight because Garcia had not faced a true welterweight before," Brook told ESPN.
"Thurman is a big welterweight who has competed at that weight his whole career.
"I would definitely like to fight Thurman because I want to unify the division before I move up. I think that would be a very explosive fight, me and Keith Thurman.
"I spoke to him back stage before I fought Shawn Porter [in 2014] and he said: 'You're the boy from England, I'm looking forward to seeing you fight.' And I said the same to him because he stands out from all the rest of the welterweights for me."
Brook has not fought since suffering his only professional defeat in 37 fights when he moved up two divisions to take on middleweight master Gennady Golovkin.
Fellow Briton Amir Khan faces a big task against WBO welterweight champion Manny Pacquiao in April, a fight Brook only sees going one way.
"I still believe Manny Pacquiao will stop Khan," said Brook.
"He's getting on a bit, Manny, but he's still good enough and there's enough energy in his legs and he will still beat Khan."