Gennady Golovkin's world middleweight title fight with Saul 'Canelo' Alvarez ended in a controversial draw.
After a closely fought bout in Las Vegas, one judge scored it 118-110 for Alvarez, another 115-113 for Golovkin and the third a 114-114 draw.
There were boos when the decision was announced at the T-Mobile Arena, and both boxers shook their heads.
Kazakh Golovkin, 35, retains his WBA, WBC and IBF titles and remains unbeaten in 38 fights.
His Mexican opponent, 27, started and finished an absorbing fight the stronger, and also produced some of the more eye-catching shots.
Golovkin, though, landed more punches and had the better of the middle rounds.
Judge Adalaide Byrd had Alvarez as a clear winner, Dave Moretti scored the bout for Golovkin and Dan Trella had the fighters level.
Alvarez's record now stands at 49 wins (34 KO), two draws and one defeat from 52 fights.
In the build-up to the fight, Golovkin had described it as the "biggest of this era" - and both men later said they were open to a rematch.