Nate Diaz and Michael Johnson had to be separated after getting involved in a tussle ahead of their lightweight fight at Saturday’s UFC event in Orlando.
MMAFighting reported sources as confirming the altercation occurred when the two fighters were walking by each other before medicals.
It was quickly broken up.
UFC middleweight Tamdan McCrory, who faces Josh Samman in the same event, captured some footage of the incident.
"I have heard about this happening but I didn't believe it until I saw it with my own eyes," he wrote on Instagram.
Watch McCrory's footage below: