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In just a few hours time, UFC lightweight champion Conor McGregor will take part in the biggest fight of his career.

On August 26, the biggest star in the combat sports world will take on the legendary Floyd 'Money' Mayweather in a lucrative boxing match.

The controversial bout, which was first mooted in May 2016, takes place at the T-Mobile Arena in Las Vegas, Nevada.

Twenty-nine-year-old McGregor, the first fighter in UFC history to hold two titles simultaneously, goes into his encounter with Mayweather having never boxed professionally.

The Irishman's lack of professional boxing experience has led many to write off his chances of becoming the first man to defeat Mayweather, who came out of retirement in March.

The eyes of the entire sporting will firmly be fixed on Ireland's first UFC belt holder if he can make good on his promise to KO Mayweather.

Here's everything you need to know about the event:

Floyd Mayweather vs. Conor McGregor takes place at the T-Mobile Arena in Las Vegas, Nevada.

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Fans wanting to see the most-talked about fight of the year will have to part with some of their hard-earned cash.

In the United Kingdom and Ireland, Mayweather vs. McGregor will be available to watch live on Sky Sports Box Office, for a fee of £19.95 (€24.95).

Fight fans in the UK and Ireland will be able to watch 'The Billion Dollar Fight' online.

Sky Box Office can be streamed online via PC, laptop, tablet and gaming consoles once purchased.

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The first bout of the four-fight undercard is expected to get underway at around 3:00am BST. The main event should start at around 5:00am BST.

Expect fireworks. McGregor, Ireland's first UFC belt holder, is on a mission to become the first man to humble 'Money' Mayweather, who has swept aside a staggering 49 opponents.

'The Notorious' has vowed to turn the combat sports world upside down by KO'ing 40-year-old Mayweather inside four rounds.

So it's safe to say we'll see McGregor come out at rip-roaring pace from the first bell.

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Venue: T-Mobile Arena, Las Vegas, Nevada

Floyd Mayweather vs. Conor McGregor (light-middleweight bout)

Gervonta Davis vs. Francisco Fonseca (Super featherweight title fight)

Nathan Cleverly vs. Badou Jack (light-heavyweight title fight)

Andrew Tabiti vs. Steve Cunningham (cruiserweight bout)

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Prelims

Yordenis Ugas vs. Thomas Dulorme (welterweight bout)

Juan Heraldez vs. Jose Miguel Borrengo (welterweight bout)

Kevin Newman vs. Antonio Hernandez (super middleweight bout)

Savannah Marshall vs. Amy Coleman (super middleweight bout)

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Full details of Floyd Mayweather and Conor McGregor's prospective earnings from 'The Money Fight' can be found here.

To follow all the results from Mayweather vs. McGregor, click this link here.

Despite having no boxing experience to his name, McGregor is confident he will land his trademark left hand on the elusive Mayweather.

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“I believe a wrap around the temple will be enough,” the Dubliner told Starsport.

“I think he’ll catch a shot right around here or here (touches the sides of my head) and he’ll hit the deck.”

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One man who believes McGregor has a great chance of shocking the world and beating Mayweather is the Irishman's bitter rival, Nate Diaz.

"I think he has a great chance," the Stockton native said during an appearance on Against All Odds with Cousin Sal podcast. "I’ve fought the top pros in the fight game, the best fighters in the world, and done better than a lot of them.

"I fought Conor for 25 minutes. I believe he’s definitely going to have a chance."