Photos: Andre Ward vs. Sergey Kovalev

Sergey Kovalev lands a left to the head of Andre Ward during their light-heavyweight title bout.

Sergey Kovalev knocks down Andre Ward during the second round of their light-heavyweight championship fight.

Referee Robert Byrd issues a standing eight-count to Andre Ward after he was knocked down by Sergey Kovalev during the second round of their light-heavyweight title bout.

Sergey Kovalev lands a left to the head of Andre Ward during their light-heavyweight championship bout on Nov. 19, 2016.

Andre Ward rests on his stool as a cornerman ices down his face between rounds of his light-heavyweight title fight against Sergey Kovalev.

Andre Ward ducks a punch and goes to the body of Sergey Kovalev during their light-heavyweight title fight on Saturday night in Las Vegas.  (Al Bello / Getty Images)

Andre Ward lands a left jab against Sergey Kovalev during their light-heavyweight title fight.  (Al Bello / Getty Images)

Sergey Kovalev and Andre Ward touch gloves at the conclusion of their light-heavyweight championship fight.

Sergey Kovalev reacts after losing a unanimous decision to Andre Ward in their light-heavyweight title fight at T-Mobile Arena on Saturday in Las Vegas.

Andre Ward celebrates after winning his light-heavyweight championship bout against Sergey Kovalev at T-Mobile Arena on Saturday in Las Vegas.

Andre Ward holds all three of the light-heavyweight belts he won by defeating Sergey Kovalev by unanimous decision on Saturday night in Las Vegas.  (Al Bello / Getty Images)

Darleys Perez of Colombia lands a right to the head of Maurice Hooker during their junior-welterweight bout at T-Mobile Arena.

Maurice Hooker delivers a left to the body of Darleys Perez of Colombia during their junior-welterweight fight.

Darleys Perez, left, and Maurice Hooker trade punches during their junior-welterweight fight.

Isaac Chilemba delivers a right to the head of Oleksandr Gvozdyk during their light-heavyweight bout.

Oleksandr Gvozdyk lands a left to the body of Isaac Chilemba during their light-heavyweight fight.

Trainer Roy Jones Jr. consoles Isaac Chilemba after he sustained an injury during his fight against Oleksandr Gvozdyk.

Curtis Stevens lands a right to the head of James De La Rosa during their middleweight fight.

James De La Rosa lands a left to the head of Curtis Stevens during their middleweight bout.

James De La Rosa, right, taunts Curtis Stevens during their middleweight fight.

Claressa Shields throws an overhand right at Franchon Crews in the second round of their super-middleweight bout at T-Mobile Arena on Saturday.

Claressa Shields connects with a right against Franchon Crews during the fourth round of their super-middleweight bout.