Floyd Mayweather wants in on the potential Justin Bieber vs. Tom Cruise fight, but not how you'd think. 

When TMZ caught up with the boxing icon, he admitted that a fight between the two celebrities was none of his business, unless they brought him on as a promoter. 

"Well, I don't really want to get in that, I don't really want to get in they business," Mayweather told TMZ when asked if he would train Bieber. "If they bring me in as a promoter, then I can talk about it. But until then, I got to stay in my lane, gotta stay in my business."

Mayweather, 42, doubled down on his refusal to comment when the reporter asked his thoughts on who would win the fight: the Candian singer and the American actor.

"Once again, I gotta stay in my lane, I gotta stay in my business," he said. 

Talk of Bieber vs. Cruise first came about when the 25-year-old challenged the 57-year-old to a fight in early June. "I wanna challenge Tom Cruise to fight in the octagon," Bieber tweeted. "Tom if you dont take this fight your scared and you will never live it down. Who is willing to put on the fight?"

Although the fight was initially deemed not a joke, Bieber later admitted that he was playing.

“The story is, I saw an interview with him, and it was just on my mind," he told TMZ a few days after his tweet. "... It was just a random tweet. I do that stuff sometimes.” 

Floyd Mayweather Jr. Floyd Mayweather Jr. at the end of his press conference at Saitama Super Arena in Saitama on Jan. 1, 2019. Photo: Getty Images/Toshifumi Kitamura