ByKal Sajad
BBC Sport journalist at Allegiant Stadium, Las Vegas
History-maker Terence Crawford stunned Saul 'Canelo' Alvarez on points in Las Vegas, becoming the first male fighter in the modern era to hold undisputed titles in three weight divisions.
In front of 70,000 fiercely pro-Alvarez fans at Allegiant Stadium, Crawford - jumping up two weight divisions - delivered a masterclass, underlining his status as boxing's pound-for-pound star.
The unbeaten 37-year-old from Ohio showcased his full arsenal of skill, defence, power and timing, leaving Alvarez, 35, clinging on at the final bell and silencing the partisan crowd.
Despite the judges scoring it tighter than expected - 116-112, 115-113, 115-113 - the verdict capped off a defining performance, on the grandest stage, that will be remembered long in the sport's history.
More to follow.