It's officially fight night, and it's arguably the biggest fight night in UFC history, as Conor McGregor faces off against Khabib Nurmagomedov for the Lightweight championship in the UFC 229 co-main event. It's all set to go down at tonight, October 6, at T-Mobile Arena in Las Vegas, Nevada. 

The build for McGregor vs Khabib started back in April when the Irish superstar attacked a bus full of UFC fighters, including the Lightweight champ, at Barclays Center in Brooklyn. Since then, the bad blood between the two fighters and their respective camps has reached a boiling point which will culminate tonight in what figures to be a vicious dogfight.

Both fighters bring something completely different to the table: Puncher vs Grappler. For McGregor, it's his devastating left hand and reach. For Khabib, it's his ability to maul opponents on the mat. 

Each man has relied on those strengths to get where they are today, but something's got to give. Tonight, McGregor will look to reclaim the 155-pound championship he was forced to relinquish months ago, while Khabib is in position to cement his legacy in the sport. You can catch the action on PPV for $64.99, the main card is scheduled to get underway at 10pm ET. 

Scroll down to check out the best knockouts and finishes of each fighter's career.