Saul 'Canelo' Alvarez has taken the WBA, WBC and IBF middleweight titles after a majority decision against Gennady Golovkin.
The fight in Las Vegas came nearly a year to the day since a split-decision draw left the Kazakh boxer stunned.
And Triple G was left to rue what could have been again, with two judges scoring the last of the 12 rounds for the Mexican, which ultimately prevented a second draw in as many fights.
Two judges scored the fight 115-113 in favour of Canelo, while the third had it at 114-114.
The pair went blow for blow in the highly anticipated bout at the T-Mobile Arena, Canelo controlling the pace but Golovkin better with the jab in the early stages.
Canelo got in some strong body work in the second half of the fight but, into the 12th round, it was the champion who was pushing harder, landing a left-hook and uppercut.
The Mexican's strong chin and even stronger resolve saw him go the distance and then take the three straps as Golovkin tasted defeat for the first time in 40 fights.