Conor McGregor hopes his physical superiority will be a telling factor against Floyd Mayweather later this month, and the two-weight UFC champion believes he can shock the world.
The UFC star, a massive underdog, will be making his professional debut at Las Vegas' T-Mobile Arena in a money-spinning bout between two of the biggest names in modern sport.
McGregor is confident he can dominate the ring due to his size in what he has labelled the 'the biggest fight of all time'. The Irishman claims he is no stranger to boxing and, once he has dispatched Mayweather, he has vowed to rule the sport.
Conor McGregor has predicted that he will beat Floyd Mayweather inside four rounds
He looked in good shape as he took to the heavy bags in front of a crowd full of cameras
But the undefeated Mayweather told the media he is not worried by McGregor's confidence
'I have a game plan and I will execute it perfectly, like always,' he said at a media workout in Las Vegas. 'I have been boxing my whole life so this is not a new experience for me.
'I will rule over MMA and boxing with an iron fist after August 26. The critics say that Floyd has been there before. They discredit my training, my