Conor McGregor can’t believe what he saw from Floyd Mayweather on Thursday.

At a press event in Miami to promote his exhibition boxing match with YouTube star Logan Paul, Mayweather was at the center of a melee after Logan’s brother, fellow YouTuber Jake Paul, removed his cap from his head. It was at that moment, with cameras surrounding them, that Mayweather attacked Jake, leading to a chaotic scene in the bowels of Hard Rock Stadium.

Any way you slice it, 44-year-old Mayweather brawling with a 24-year-old YouTuber with just three professional fights (all wins against non-boxers) is a sad sight for McGregor to see. And he let that be known in an Instagram post in which he tagged Mayweather Promotions CEO Leonard Ellerbe.

“Pro to pro it’s embarrassing,” McGregor wrote and continued, “Whatever way you spin this, it’s sad.”

Hey @leonardellerbe, what the fuck is Floyd at?
The kid curled up, didn’t fight back once, and Floyd is still running around acting the tough guy.
The kid actually just pulled this shambles of a situation Floyd is in out of the drain for him.
He should thank him.
It’s embarrassing!
Pro to pro it’s embarrassing. He will not scratch 10m for this fight and he knows it. It was cancelled once already. The world is watching this on Twitter. He’d fight a half decent pro and command 20m upwards, yet its this shit.
Whatever way you spin this, it’s sad.
Fight someone for real, on your record, or fuck off mate.
Slap head!

McGregor and Mayweather have a well known history, as the former UFC two-division champion lost to Mayweather by 10th-round TKO back in August 2017. The two men went on a week-long “world tour” in the build-up to their “Money Fight,” which contained no shortage eyebrow-raising moments but never anything physical like what happened between Mayweather and Jake Paul on Thursday.

McGregor has repeated ever since the loss to Mayweather that he’d love a rematch, but to no avail.

McGregor is set to fight Dustin Poirier in a trilogy on July 10 at UFC 263 in Las Vegas. The pay-per-view exhibition between Mayweather and Logan Paul is scheduled for June 6 at Hard Rock Stadium in Miami.