At the end of the eighth, Tyson caught the challenger with a right uppercut, sending him to the canvass. After pounding his fist on the canvass in disappointment, Douglas got up to beat the 10-count.

Tyson was the reigning undisputed heavyweight champion of the world, and a frightening opponent to boot, when he entered the ring against James “Buster” Douglas on Feb. 11, 1990, in Tokyo.

Heavyweight boxer James "Buster" Douglas waves his gloved hand to the cheering crowd as he makes his way to the dressing room following a 10th round knockout victory over Mike Tyson in a scheduled ...

21 years ago this coming Friday, James "Buster" Douglas defeated "Iron" Mike Tyson by a 10th round TKO to become the undisputed heavyweight champion in one of the biggest upsets in sports history ...

Douglas relaxed after his legendary showing versus Tyson and he was entirely unprepared to make his first title defense against Evander “The Real Deal” Holyfield (42-10-2, 27 KOs) in October 1990.

Buster Douglas watches Mike Tyson fall after a 10th-round knockout punch that ended their heavyweight championship fight on Feb. 11, 1990. (AP Photo/Sadayuki Mikami)Randy Miller | NJ Advance Media ...

Sure enough, Douglas amazingly captured all three heavyweight belts with a 10th-round knockout of Tyson. “Iron Mike’s” desperate grip for both his slobbered mouthpiece and his invincibility ...

Thirty years ago, Douglas was a 42-to-1 underdog heading into his fight against Tyson, who at the time was 37-0 with 33 knockouts. On Feb. 11, 1990 in Tokyo, Douglas knocked him out in the 10th round.

In this Feb. 11, 1990, file photo, James Douglas, left, follows with a left, dropping Mike Tyson to the canvas in the 10th round of scheduled 12-round heavyweight champion bout at the Tokyo Dome ...

COLUMBUS, Ohio — Thirty years after his startling victory against boxing titan Mike Tyson, Buster Douglas is feeling healthy and basking in the glory he says he was denied at the time. “Right ...

Tyson was the reigning undisputed heavyweight champion of the world, and a frightening opponent to boot, when he entered the ring against James “Buster” Douglas on Feb. 11, 1990, in Tokyo.