WATCH: David Haye throws punch at Tony Bellew at heated press conference

David Haye threw a punch at Tony Bellew as the two went head-to-head at a heated press conference to promote their March 4 heavyweight fight.

Warning: Strong language throughout.

BREAKING NEWS: BELLEW PUSHES HAYE IN HEAD TO HEAD AND HAYE THROWS A PUNCH!!!@EddieHearn @mrdavidhaye @TonyBellew https://t.co/AmwZWAl34V

— Strictly Boxing Fans (@BoxingBritain1) November 30, 2016

The former WBA champion displayed an uncharacteristic lack of composure throughout, angrily insulting promoter Eddie Hearn and Bellew's trainer David Coldwell, as well as his opponent.

Haye had previously been involved in violence at a press conference when he brawled with Dereck Chisora in 2012 but on that occasion he felt provoked. He often cuts a well-prepared figure when appearing publicly; here his reaction to a routine shove from Bellew appeared the culmination of the intense pressure he seemed under.

What a press conference! Roll on March 4! #HayeBellew pic.twitter.com/VsIiWIOBMl

— Eddie Hearn (@EddieHearn) November 30, 2016

The two were then separated by the numerous security guards present and ushered into different rooms, but only after having spent the previous 20 minutes trying to shout over each other.