Dereck Chisora has "wholeheartedly apologised" for his "inexcusable" actions in Munich at the weekend including the shocking post-fight brawl with fellow British heavyweight David Haye.
On Friday Chisora, 28, slapped opponent Vitali Klitschko ahead of their WBC title fight at the Olympiahalle, which he lost on points.
After the bout, though, Chisora brawled with Haye at a press conference and threatened to "shoot" his rival. He was arrested by Munich police yesterday but released after questioning.
Chisora said in a statement released to Press Association Sport: "Following the extensive media coverage that my WBC world heavyweight title challenge against Vitali Klitschko in Munich at the weekend has attracted, I feel I must wholeheartedly apologise for my part in the regrettable scenes both before and after what was to be the biggest night of my career.
"Whilst my behaviour was inexcusable, there were many things that went on behind the scenes that ultimately caused my frustrations to boil over, however this is of course no excuse."
Chisora claimed at the time to have been "glassed" and reiterated his claim that he was hit by a bottle.
He said: "I cannot go into the specific details at the moment as quite rightly the British Boxing Board of Control will be investigating this matter and also the altercation that took place between David Haye and myself where I was struck by a bottle.
"Despite all of this, the bottom line is, I have let my family, my team and worst of all the sport I love down.
"I acknowledge that my actions were totally unprofessional, with or without provocation. Now, with a cool head and the benefit of hindsight, my actions at the weekend were regrettable to say the least and I am deeply embarrassed at the scenes reported in the media.
"I acknowledge that I have a duty as a professional boxer to conduct myself properly at all times, especially with boxing being a sport of controlled aggression. I have let lots of people down on Saturday night, including myself, and for that I am truly sorry.
"In Munich I fully co-operated with the German authorities and as a result I was released without charge. I will be making no further comment at this stage and will wait for any formal hearing to take place."
Haye - still wanted by Munich Police - also spoke out this afternoon and says he will assist the boxing authorities in their enquiries.
He said: "I realise I am no angel - and don't mind a bit of professional trash-talk to help raise boxing's profile - but, during my 21 years in the sport, I have never been involved in, or even witnessed, such a serious fracas.
"If requested, I shall happily assist the boxing authorities with any investigation they wish to launch and, ultimately, hope that all lessons learned from this incident will be implemented."
