We’re now just days away before the most lucrative fight in history takes place at the T-Mobile Arena in Las Vegas.UFC superstar Conor McGregor takes on boxing legend Floyd Mayweather on Saturday evening in a bout that nobody quite knows what to expect.Although Mayweather is still the firm favourite to win this weekend - the bookmakers have him as 1/4 to win the fight - his odds have lengthened slightly over recent weeks.McGregor, thanks to his unrivaled ability when it comes to trash talking, has convinced some punters that he’s genuinely capable of causing an upset.You can currently get around 3/1 on the Irishman pulling off arguably the biggest shock in boxing history.

McGregor believes he will beat Mayweather

McGregor has, more importantly, appeared to have convinced himself that he can beat Mayweather on Saturday.

"If there’s ever a contest to be motivated by this is the one,” ‘Notorious’ said in a recent interview with ShowTime. “Not a chance, not a hope, he’s not going to land a glove, he’s going to get embarrassed, he’s going to get killed.

“My whole career, I am always told – I can’t do this – I can’t do that, I feel when someone tells you you can’t do something that’s when you must do something.

“He’s sparring 135 lbs kids, you think I’m a 135 lbs kid? I’m a 170 lbs Irish gorilla and I am going to rip his head off and play football with it.

“You’re seeing an animal come in here and destroy the whole game.”

McGregor sends cocky tweet to Mayweather

McGregor has now followed that up by posting a rather cocky tweet to Mayweather…

“Wake up Floyd. It's all over,” McGregor tweeted, alongside a photo of himself celebrating a victory with boxing gloves on.

And yes... it's gone viral.

A sign of things to come or pure fantasy?

We will find out in just a few days’ time.