After weeks of posturing and verbal sparring, Floyd Mayweather Jr v Conor McGregor is finally upon us.
The duo - never afraid to let their opinions be heard - have spent much of the past two months trash talking and making bold promises of knockout victories.
Mayweather, with a 49-0 record, is regarded as the hot favourite to prevail at the T-Mobile Arena in Las Vegas but the ultra-confident McGregor is not a man to be taken lightly.
Here, we take a look at the Opta numbers behind the blockbusting crossover battle.
50 - Should Mayweather claim glory and extend his perfect streak as a professional to 50-0, he will eclipse the record set by Rocky Marciano.
5 - During that time, Mayweather has claimed world titles in five different weight classes.
3 - McGregor's three losses in MMA have all come by submission; he has never lost by decision or by KO/TKO.
15 - This is the 15th time in succession that Mayweather has boxed in Las Vegas. It is the first time since 2006 that he's fought at a venue other than the MGM Grand, however.
1 - McGregor was the first fighter in UFC history to simultaneously hold two belts (featherweight and lightweight).
2 - This fight comes almost two years since Mayweather’s last outing (vs Andre Berto in September 2015). This is his longest ever break between fights as a professional.
13 - McGregor has the fastest finish in a UFC title bout with a 13-second KO vs Jose Aldo (UFC 194).
8 - Mayweather's last stoppage victory occurred eight fights ago in 2011 but came in controversial circumstances against Victor Ortiz. Many argue his last "legitimate" KO victory came against Ricky Hatton in 2007.
2 - McGregor has only had to go to decision twice (winning both, the second time at UFC 202 - the only time he has completed five rounds).
250 - 'Money' Mayweather earned around $250million for the Manny Pacquiao fight in May 2015 which broke every financial record in boxing and claimed 4.6million pay-per-view buys.