Canelo Alvarez knocked out Sergey Kovalev with a vicious combination to win the WBO light heavyweight title on Saturday, moving up two weight classes to become a four division champion.

The 29-year-old Mexican superstar caught Russia's Kovalev with a left hook-right hand combination that sent the former champion almost crashing through the ropes near the end of the 11th round at the MGM Grand Garden Arena in Las Vegas.

Kovalev was officially knocked out at 2:15 of the 11th and stayed down for some time while being attended to by his corner and the doctor.

It was one of the devastating knockouts of the brilliant career of middleweight king Alvarez, who was fighting in the 175 pound division for the first time. The fight had been close throughout with Kovalev (34-4-1, 29 KOs) winning most of the early rounds by using a steady jab to keep the burly Alvarez at a distance. Alvarez (53-1-2, 36 KOs) becomes just the fourth boxer in history to win a junior middleweight world title and one at light heavyweight, a spread of 21 pounds (154 to 175).

Copyright Agence France-Presse, 2019