Barrera finds Juarez with a left in Vegas

Judges awarded Barrera the victory by 117-111, 115-113 and 115-113 in a rematch of a May bout in LA that ended in a controversial Barrera triumph.

"I moved very fast, I used my jab. I knew if I had to take him to the school I would do it," said the Mexican.

Barrera improved his record to 63-4 while Juarez fell to 25-3.

In May, the first fight was initially announced to the crowd as a draw.

But minutes later Barrera was awarded a 12-round majority decision when two judges scored it for him by 115-114 and 115-113. The other saw Juarez as a 115-114 winner.

FIVE LIVE VIEW Barrera is getting on a bit and I would like to see him quit at the top of his game BF Five Live: Have your say

"I learned never fight to the level to the challenger," Barrera said. "I'm the champion. I need to use my experience."

Barrera controlled the tempo in Las Vegas with a conservative style, swelling Juarez's right eye in the fifth round.

"He caught me with a good uppercut and closed my eye," Juarez said.

"He fought a good fight. He kept a good jab. He kept retreating. I wasn't able to get a very good shot at him. When I got inside he wouldn't trade with me.

"He just smothered me and waited for the referee to break him up."

Juarez was off-balance much of the night in the tactical duel, Barrera guarding and moving well but neither man throwing combinations.