It was fight night in Las Vegas on Saturday, but it didn’t happen in the ring. T.I. and Floyd Mayweather Jr. got into a massive brawl at a Fatburger on the Strip.

According to TMZ, the boxing champ was eating inside the restaurant when T.I. walked up and exchanged heated words with him. The rapper allegedly swung at Mayweather before a chair-tossing brawl erupted and bodyguards stepped in to break things up.

It’s unclear what caused the altercation, but it appears that T.I.’s wife Tiny was hanging out with Mayweather and his 14-year-old daughter earlier in the day.

At one point, Mayweather was heard telling T.I., “You control your bitch, motherfu**er. Go get mad at your bitch.”

Police arrived just as Mayweather was leaving, but T.I. had already fled the scene.

A Fatburger employee was slightly injured during the fight, but he refused treatment and did not want to cooperate with police.

50 Cent, who is friends with Mayweather, weighed in with his hilarious commentary on Instagram.

“My little brothers crazy,first RAY j then Nelly now TIP,” he said of Mayweather.

Bystanders captured video, which can be seen below.