They confirmed that the fight is on and that it is scheduled for 26th of August in Las Vegas, at the T-Mobile Arena in Las Vegas.
The two biggest names in combat sports collide this summer. "I was actually a guy who got tickets and I couldn't get the tickets the week of the fight".
In an interview with The Telegraph, Mr Espinoza said: "There was a significant impediment that was removed a couple of weeks ago and that was the UFC going on record saying they didn't want Conor to participate".
"I think it's a bit unfair because boxing and MMA are two different sports and Conor McGregor, if I'm being blatantly honest, if he lands a glove on Mayweather he'll be doing very well", said the Northern Irishman.
"I can't talk about that", Mayweather said when asked how much money he would earn for the fight. By the time the bell rings, the number on his check will already be locked in.
McGregor's agent, Audie Attar, said McGregor is committed to boxing only in this fight. He's already spent the a year ago taking jabs at Mayweather.
Sheri's Ranch's owner Chuck Lee is happy to provide that once in a lifetime experience to a few lucky fight fans - for the right price.
The fight is expected to become the highest grossing event in the history of either sport. The chances of the fight being entertaining are miniscule. Showtime could charge money for the series and people would cough up the money. [McGregor]'s a real life Rocky. This is a UFC fighter we're talking about.
"That is what makes this fight so interesting - Floyd is undefeated, Conor is young, he's the best MMA fighter ever". "Listen, I've got the best coaches in the world and I'd definitely be ready for that fight".
25 - Hours of community service undertaken by McGregor as punishment for a bottle-throwing incident prior to his match with Nate Diaz. That, on its own, is an fantastic accomplishment.
"This is bigger than Mayweather v Pacquiao", he told reporters. Fighters are going to receive at least $100 million each. When Mayweather preserved his unbeaten record against Manny Pacquiao, in 2015, the Mirror reports that Mayweather's share of the purse was $180 million.
And the fans will win too. What can we look forward to, and what should we be anxious about?