Maccarinelli could face Denis Lebedev at the O2 Arena on 27 June
Enzo Maccarinelli has left trainer Enzo Calzaghe to work with Preston's Karl Ince in his bid to become the first Welshman to reclaim a world title.
Swansea's Maccarinelli, 28, wants to revive his career after a knock-out defeat to Ola Afolabi in March.
The ex-WBO cruiserweight champion was stopped in the second in a unification bout with David Haye in March 2008.
Maccarinelli's promoter Frank Warren says the Welshman could next face Denis Lebedev at the O2 Arena on 27 June.
The 29-year-old Moscow southpaw, who is also on Warren's books, has won all 17 of his professional fights, 12 by knock-out, while Maccarinelli has a record of 29 wins (22 knock-outs) and three defeats.
The Russian is untested at world level, but the bout would make an intriguing match-up on the Amir Khan-Andreas Kotelnik undercard.
New trainer Ince, who lives in Preston, is a respected figure and a former professional fighter himself who learnt his trade under Brian Hughes.
He has appeared in the corner for Maccarinelli's close friend Joe Calzaghe, the son of Enzo.
Maccarinelli joined the Calzaghe team in 2006, the year in which he claimed the world title.
Warren, who has this year been involved in a high-profile court battle with the Calzaghes, criticised Maccarinelli's preparation after the Afolabi defeat.
Warren said at the time: "He [Maccarinelli] has told me he didn't have one round of sparring before the fight and I find that amazing preparation or lack of preparation - for a fight. I'm stunned by it."
Enzo Calzaghe countered: "He did as much sparring as he has before.
"Joe Calzaghe never sparred - and he was a world champion for 11 years.
"And all the sparring in the world cannot change the fact that Enzo has not fought for 12 months apart from some Mickey Mouse fight with Matthew Ellis at heavyweight. Why hasn't he boxed for 12 months?
"Enzo didn't have a tape of the guy until fight night so we didn't see who we were up against until two hours before the fight.
"A fighter should know who he is up against six weeks before the fight."
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