Kell Brook labelled British rival Amir Khan a 'con man' as the Sheffield fighter continues to seek a blockbuster domestic bout with the Bolton boxer.
Brook is preparing to face Australia's Michael Zerafa on Saturday in a WBA final eliminator for the super-welterweight world title in the hope that victory would see a bout with Khan edge closer.
But with Khan on the verge of sealing a fight deal with American star Terence Crawford, Brook has been left incensed at the delay in fixing a date for the pair to share the ring.
"Amir Khan is a con man, they should call him Amir 'con'," Brook said at Thursday's press conference.
"This is his last big fight under Matchroom and I thought it was nailed on. He shook my hand and looked me dead in the eye and said we would fight next. What can I do, I've bent over backwards and said I'd come down to 147.
"I'm doing everything I can for the fans, he's turned his back on them. Everyone knows it's him that's running off.
"I want any elite fighter and could weigh in at 147 tomorrow if I wanted, I've got that buzz again. I want the top guys, Shawn Porter with the WBC title if he wants a rematch or I'd love to bring Errol Spence Jr back in the summer and get the win."
Back in September, promoter Eddie Hearn warned it is "now or never" if long-time rivals Khan and Brook are to finally settle their differences in a domestic super-fight - but both have cast their eyes elsewhere so far.
A war of words between the pair has ensued in recent years with each win appearing to place the British fighters on a collision course.