Maybe this will convince Roy Jones Jr. that enough is enough.

The one-time greatest fighter on the planet, now 40, was knocked out by Danny Green only 122 seconds into a scheduled 12-round cruiserweight fight today in Sydney, Australia, scuttling his planned rematch with Bernard Hopkins and perhaps ending his career.

Jones went down from a right to the head with 1:47 remaining in the opening round. He was able to get up but couldn’t defend him against an onslaught of follow up punches and the fight was stopped.

There wasn’t much Jones could say afterward.

“I take my hat off to Danny Green. It was a great performance tonight,” Jones told the Herald Sun in Sydney. “I don't make any excuses. It was a great performance. I had a great time in Australia. I enjoyed myself a whole lot.”

Green (28-3, 25 KOs), a former light heavyweight titleholder, took limited pleasure from the experience.

“I almost felt bad doing that,” he told the Herald Sun. “It almost hurt me to do that to someone I look up to as a professional inside and outside the ring.”

Jones (54-6, 40 knockouts) was set to fight Hopkins on pay-per-view in March if both won their fights today, Jones in Sydney and Hopkins against Enrique Ornelas in Philadelphia. It would’ve been a rematch of their 1993 fight, won by Jones.

However, now Jones, his skills obviously faded, must consider retirement and a relatively fresh Hopkins will have to find another foil assuming they don’t go through with the fight in spite of Jones’ setback.

Jones, an eight-time titleholder in four weight divisions, is now 5-5 in his last 10 fights.