LAS VEGAS, Nevada (CMC) — Glen Johnson defied age on Saturday and knocked-out Allan Green in the eighth round of the Super Six World Boxing Classic to advance to the semi-finals.

The Jamaica-born Johnson, aged 41, landed a brutal right-left combination that sent Green sprawling to the canvas, which left him unable to beat the referee’s count in the MGM Grand Casino.

“Green is a good fighter who throws quick combinations,” said Johnson. “I knew I had to be patient, and that my time would come.”

The result earned Johnson three points on the Super Six leaderboard and the final spot in the semis.

He will learn his semi-final opponent following the final group stage bout on Saturday, November 27 between Arthur Abraham and Carl Froch (both of whom have already qualified for the semis).

When the fight ended, Johnson was ahead 68-65 on one of the judges’ scorecard, and Green was leading 67-66 on two of the judges’ scorecards.

Still, Johnson had looked in control of the fight in the early rounds and was far more aggressive than Green.

Johnson wobbled Green in the third round with an uppercut and continued to punish his opponent.

The Jamaican, 51-14 with two draws and 35 knockouts, was fighting at super-middleweight for the first time in 10 years.

He is seeking a title chance by filling-in for Danish fighter Mikkel Kessler, who had an eye injury.

The Super Six World Boxing Classic is a tournament for the World Boxing Association and World Boxing Council super-middleweight titles.