Here we go. Khabib Nurmagomedov versus Conor McGregor. The UFC's undefeated lightweight champion, versus the sport's biggest star, returning from a two-year hiatus.
It's everything you want in a main event: Divisional supremacy, bad blood, dueling fanbases, clashing styles. McGregor is a great salesman and he'll never want for a crowd, but what he's selling here is 100 percent legitimate. This is not some tuneup fight he's come back for. This is, arguably, the riskiest fight he could have taken.
Here's what you need to know about the UFC 229 main event at T-Mobile Arena in Las Vegas on Saturday.