Logan Paul has the talking part down pat.

Sunday, the world will see if he can back up his big words when he meets legendary boxer Floyd Mayweather Jr. in an exhibition bout.

A social media influencer and YouTube sensation known for trolling, the 26-year-old Paul has talked big about ruining Mayweather’s legacy, now saying he has duped him into a position that he will regret.

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"You are witnessing the greatest finesse job in history," Paul told CBS Sports. "Why is Floyd Mayweather getting in the ring with me? He has everything to lose. You got finessed. You got finessed, Floyd. Imagine I beat him for one second. I have to imagine taking this fight would be a regret."

At 6-foot-2 and nearly 200 pounds, Paul is bigger and stronger than Mayweather. He is also much younger. That, he believes, will make up for his lack of experience, which consists of one pro fight: a loss to fellow Youtube star KSI.

"[This fight] is a circus but I’m going to be honest, I wasn’t at first. I was really treating this as kind of a respectful exhibition," Paul told the website. "I wanted to acknowledge Floyd’s career path and everything he has accomplished. I was trying to be respectful and then my brother took his hat and [Mayweather] said he was going to kill Jake and I don’t take that s–t lightly.

"It has become super personal. Just the way he is talking online and he thinks he is in control of this fight to the T. It’s going to take 44 years of Floyd’s life for him to be humbled."

Paul and his trainer Milton Lacroix believe he can out-box Mayweather, one of the great technicians of all time. Lacroix said his jab is advanced and predicted Mayweather would quit by the sixth round.

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"I’m not going to make it ugly — it’s going to be the cleanest display of boxing that you are going to see," Paul said. "I think it’s going to be two phases that Floyd has in this fight. One, the realization that he might be in over his head. The realization that the kid standing across from him isn’t a fake fighter, isn’t just a YouTuber and that he had been doing this shit for some time now.

"Then when he realizes he might have to work a little harder than he thought and he’s not getting the ins he thought he would, that’s when he’s going to hit desperation. I think when Floyd’s desperate and I can see in his face that he’s broke, that’s when I got him. I think that’s when he is going to lose."