Dallas Cowboys pair Dez Bryant and Tyler Patmon were involved in a training-ground bust-up on Sunday.
Training camp scuffles are not uncommon, but they become noteworthy when they involve star players.
Such was the case on Sunday when Dallas Cowboys Pro Bowl receiver Dez Bryant took a swing at team-mate Tyler Patmon.
The altercation took place on the sideline after a completion to tight end Jason Witten. As Witten ran up the sideline, a scuffle began nearby with Bryant trying to punch Patmon, a second-year cornerback from Oklahoma State.
Bryant is also an Oklahoma State alumnus, but the two were never team-mates in college.
It is not clear what exactly started the fight, which was extremely brief after team-mates pulled Bryant away. Reports from Cowboys media have said tensions between the two had been building early in camp.
Bryant said he got a little "overheated" after practice, but that he and Patmon have squashed any issues.
"At the end of the day he wasn't going to back down and I wasn't going to back down and you seen us: We shook hands, we hugged and we respect one another," Bryant told reporters.
"You don't want somebody weak on your team. That's why Patmon, he was undrafted and he's fighting his way. And he's fighting for respect and he got mine. I'll go to war with a guy like that any day of the week."
Patmon added: "Oh, man, it's just brothers. Brothers fight.
"It's just what happens sometimes. So we go out at, we squashed and it's over."