The fight between David Haye and Dereck Chisora is to go ahead despite threats from the British Boxing Board of Control (BBBofC), according to promoter Frank Warren.
Haye and Chisora clashed outside the ring in a much publicised brawl at a Munich press conference in March, which resulted in the latter being stripped of his licence.
Luxembourg's Boxing Federation were called upon to provide licences for the controversial bout, scheduled to take place in London this summer.
The BBBofC condemned the match, claiming that it will bring the sport into "disrepute", and has warned that anyone involved in the event is at risk of being served with a ban.
However, Warren insists that the fight will go ahead, calling the governing body's threats "libellous" and a "restraint of trade".
"This fight going on in this country doesn't breach any British Boxing Board of Control regulations or rules," he told talkSPORT.
"The fact of the matter is that Luxembourg are members of the European Boxing Union, the same as the British Boxing Board of Control. They're members of the WBC, the WBA, the IBF and the WBO, the same as the British Boxing Board of Control.
"They even wrote to the EBU to try and stop this from happening and the EBU said, 'no, this is what Europe is all about, if another governing body wants to sanction a bout in another country, that's what the EBU is about'."
Haye will take on Chisora at Upton Park on July 14.
