Floyd Mayweather, the greatest boxer of his generation, will take on UFC champion Conor McGregor on August 26 in Las Vegas.
The mega-fight, which will be contested over 12 rounds and which could generate upwards of £500million, was finally confirmed on Wednesday night following weeks of negotiations and months of speculation.
Mayweather will fight for the first time in two years at the T-Mobile Arena while McGregor will box professionally for the first time ever.
UFC president Dana White has claimed McGregor will earn $100m (£78.5m) from the fight while Mayweather is likely to pocket significantly more.
The UFC chief then went on to reveal that Mayweather vs McGregor will take place at a weight of 154lbs.
He said: “Conor McGregor is 100 percent positive he will win this fight.”