Andre Ward has unanimously outpointed Sullivan Barrera in his light heavyweight debut to set the stage for a potential title fight against unified champion Sergey Kovalev.

Ending a nine-month layoff while fighting for just the fourth time in four years, Ward (29-0) knocked down Barrera in the second round with a sharp left.

The 34-year-old Cuban bounced up quickly before Ward landed another pair of stinging lefts to the head.

About the only thing to go wrong for the Oakland fighter came late in the eighth when referee Raul Caiz deducted a point from Ward for a low blow that sent Barrera (17-1) down to one knee.

Ward also drew a warning in the 10th for an accidental head butt.

But all three judges had Ward winning easily. The scores were 117-109, 119-109 and 117-108.

The win paves the way for Ward to fight Kovalev, the Russian slugger who has defended his title three times since beating Bernard Hopkins in a unification match in 2014.

While talks between both camps have been ongoing, things are expected to heat up now.

"I understand that most people don't love me here (in Oakland) because I want to beat him in front of his fans. He looked very good, but I know that he can look much better. He did not show his entire arsenal because he was out for so long. It will be an interesting fight when we meet."