Jon Jones and Daniel Cormier brawl at UFC 178 media day

Jon Jones and Daniel Cormier are scheduled to fight each other at UFC 178 in Las Vegas at the end of September. Monday, they met at a press conference promoting the event and came to blows.

Jon Jones and Daniel Cormier are scheduled to fight each other at UFC 178 in Las Vegas at the end of September. On Monday, they met at a press conference promoting the event and came to blows. 

It started when Jones rested his forehead against Cormier's. Cormier pushed Jones away and Jones lunged back at him and the pair tumbled off the small stage. A brief scrum followed before they were separated. 

Another video shows Jones landing a few big shots with his left while Cormier is on his back.

More: Jon Jones, Daniel Cormier title fight a win-win situation for MMA fans​

Afterwards, Cormier and Jones took their dispute to social media. 

"@JonnyBones: Come on DC where was your takedown defense?" I got some td def for you. Don't ever put ur dirty face on me again.

— Daniel Cormier (@dc_mma) August 4, 2014

I won't let another man get in my face and put his forehead against mine. I will react every time. @JonnyBones next time I will slap you.

— Daniel Cormier (@dc_mma) August 4, 2014

I put you on your back in six seconds

— BONY (@JonnyBones) August 4, 2014

Put some ice on that face DC, you got lots of interviews tomorrow

— BONY (@JonnyBones) August 4, 2014

Lol those baby punches from the bottom, I really hope you have more prepared than that for when I take you down again

— BONY (@JonnyBones) August 4, 2014

And he got what he deserved “@Lazarus_lara98: He's a punk for pushing you @JonnyBones you got this !”

— BONY (@JonnyBones) August 4, 2014

Jones was originally scheduled to fight Alexander Gustaffson in a rematch of their UFC 165 Light Heavyweight championship match, but Gustaffson was forced to pull out with a knee injury. Cormier was announced as his replacement on July 23.

- Dan Gartland