Dereck Chisora has sparked mayhem at a weigh-in, chasing down a photographer who he claimed struck him with a bottle.

Chisora, 32, takes on Kubrat Pulev in Hamburg on Saturday 7 May. The two almost came to blows during a heated press conference on Wednesday and clashed again during Friday's weigh-in.

During subsequent chaotic scenes, Chisora seemed to lose control and break away into the crowd – where media and members of the public were present – to pursue a photographer. The heavyweight chases the culprit into a hallway and is heard shouting, "Don't f**king take pictures of me," in a video released by Sauerland Promotions and uploaded to Youtube by World Boxing News.

The scenes were reminiscent of those that unfolded in Munich in 2012, when David Haye gate-crashed a post-fight press conference following Chisora's loss to Vitali Klitschko, leading to a mass brawl involving the two British heavyweights.

Chisora's rap sheet also includes a slap on the elder Klitschko brother during the build-ip to that 2012 showdown, where he also spat water in the face of Vitali's brother Wladimir on the way to the ring.
Should their bout still go ahead, Chisora and Pulev will battle for the European title with the winner to move up to the number two ranking for the IBF title, which is currently held by Anthony Joshua.