Conor McGregor, the brash U.F.C. champion, takes on undefeated boxer Floyd Mayweather Jr. in the most anticipated boxing match in years. Coverage of the fight in Las Vegas begins at 9 p.m. Eastern, but the main event is expected to begin much later. Stay here for live, round-by-round updates and analysis. How to watch.
There are those who say that Conor McGregor, a 5-1 underdog with the bookies, should be more like 100-1 or 1,000-1. If this is so, the bout will probably be ugly early. Watch to see if McGregor lands any blows at all in the first round or two.