Youtube star Jake Paul has issued a warning to his potential next opponent, Tommy Fury.

Both of them will be in action on Sunday night, at the Rocket Mortgage FieldHouse in Cleveland.

Paul (3-0, 3 KOs) will headline the Showtime Pay-Per-View event, in a boxing match with former UFC champion Tyron Woodley.

Fury (6-0, 4 KOs), the younger brother of WBC heavyweight champion Tyson Fury, will make his United States debut as he opens up the PPV card, against combat sports veteran Anthony Taylor.

Paul and Fury have been trading words on social media since last year.

If both of them win this Sunday, they could very well face each other next.

Back in May, Paul created chaos when he appeared at a press conference to promote his brother Logan's exhibition fight with Floyd Mayweather.

Paul snatched Mayweather's hat off his head - which created a wild scuffle involving both men and their respective teams.

He promises to do the same to Fury - should he wear a hat. 

"I would tell him not to wear a hat. If he wants to play those games, we can play those games, Tommy," Paul told The Sun.

"Look, if you want to wear a hat, that sh!t's going to get taken, one way or another. I'm stealing everybody's hat, nobody's hat's safe. This kid's not fast enough, Floyd Mayweather, I took this guy's hat and he had to have 20 guys to hold me down before he could get one punch off 15 seconds later.

"Oh, and by the way, that was my warm up, so now I've got one under my belt, one stolen hat under my belt, the second one? Way easier."