Legal scrap over Haye and Chisora
The proposed fight between David Haye and Dereck Chisora could lead to a confrontation in court.
The Luxembourg Boxing Federation says it has started legal action to prevent British boxing authorities "intimidating" its members over involvement in the clash between the two British heavyweights.
Officials in Luxembourg issued legal proceedings on Wednesday after the British Boxing Board of Control threatened to rescind the licences of members involved in the bout.
The LBF said it was left with "no option" but to take legal steps.
The fight, to be televised in the UK, the United States, Germany and about 60 other countries, is scheduled for next Saturday at a venue in east London.
Haye and Chisora traded blows at a news conference after Chisora's loss to WBC champion Vitali Klitschko in Munich in February.
Their infamous confrontation resulted in the BBBC stripping Chisora of his licence. Haye was unlicensed because he had retired.
The Luxembourg officials sanctioned the fight after the BBBC refused to do so and says 28 00 tickets have been sold.
Haye is a former WBC and WBA cruiserweight champion and also held the WBA heavyweight title.
He and Chisora agreed to fight for the WBO International and WBA Intercontinental belts in a tournament in Upton Park in West Ham.
The European Boxing Union decided last month that the Luxembourg federation would lose its membership of the union if they continued to sanction the bout.