And the YouTube star, 25, has claimed it all started at a random charity basketball game last year.
The pair were playing on opposite teams when Mayweather ‘put hands on him’, which Paul called ‘disrespectful’.
Paul said he’s ‘never forgotten and never forgiven him’ for it.
From there, Paul concocted a plan: To wind up Mayweather, 43, so much at a fan meet and greet on Fanmio that the Las Vegas legend had no option but to fight him.
After initially intending to just ‘chirp a bit’ during the call, Paul joked: “The next thing you know, I’m talking s*** to the greatest boxer on the planet.”
Addressing Mayweather, Paul said: “I got a question for you: You down to fight me?”