It was a rough afternoon for Raiders fans who made the trek to Allegiant Stadium just to watch Shedeur Sanders win his NFL debut for the Browns, but one man in particular had it worse ... as he was involved in a full-blown fistfight in the stands.

Footage of the scrap started circulating on social media on Sunday. While it's unclear what led up to the incident, you can see a man in a No. 2 Raiders jersey land a solid punch on another spectator.

The man -- alongside a patron in a Browns jersey -- is then held back by someone in an attempt to de-escalate the situation.

Unfortunately for them ... their altercation ended up on officials' radars.

After a cut in the video, you see the Raiders and Browns fans being escorted from their sections, with the Silver and Black supporter's hand

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