Kiko Martinez's manager Miguel Angel De Pablos says Carl Frampton is one of four options the champion is looking at for his next defence of the IBF World super-bantamweight title.
Undefeated Frampton was at ringside in Elche, Alicante on Saturday night with his manager Barry McGuigan to witness Martinez stop South African Jeffrey Mathebula in the ninth round, amid quite a bit of hostility aimed at the Belfast man.
"I laughed off a lot of the booing and the comments but some of the stuff was very aggressive and we actually had to move seats. There was quite a bit of hate towards me," said Frampton.
"Every time I stood up I got booed and throughout the fight this guy sitting behind me and Barry kept saying in English, 'Kiko going forward, not like a chicken running'. I just laughed at it.
"I didn't see anything different from Kiko. He kept coming forward but was predictable and from about 30 seconds into the fight Barry and I looked at each other as if to say that Mathebula had no chance. I've never seen a guy go backwards so much in such a short space of time. Mathebula had nothing to offer, he looked shot."
Martinez's manager De Pablos says he and promotional company Maravilla are now determined to see the Spaniard cash in on a money-spinning voluntary defence.
"The negotiations are now just beginning. Frampton is an option, so is Quigg and there's also interest from Japan and we have the option of going to the USA," said De Pablos.
"Kiko will now take four weeks off and by the end of January we would hope to know the next person he is fighting. We would hope he will fight again in April. We will be doing what is best for Kiko's pocket. He is a champion and he can earn very good money."
Meanwhile, former European light-welterweight champion Paul McCloskey suffered a shocking defeat to Derby's Dave Ryan, 77-75 over eight rounds in Leeds on Saturday night.
McCloskey had Ryan on the floor from a body shot in the fourth round but throughout the fight he was repeatedly caught with punches from an opponent who entered the ring with a record of 14 wins and eight defeats.