BOXING: DOWN AND OUT; Sensational upset as Tyson is beaten.

BRITISH boxer Danny Williams has sensationally crushed Mike Tyson to turn the heavyweight world upside-down in Louisville.

The Brixton man smashed Tyson to the canvas where he was counted out by referee Dennis Alfred two minutes and 51 seconds into round four.

It was one of the biggest upsets of all time matching Tyson's stunning defeat by Buster Douglas 14 years ago.

Williams landed 16 unanswered blows before the swinging right hook which sent Tyson spinning backwards into the ropes.

As he scrabbled about on his back with his senses gone, the referee counted him out and sparked manic celebrations.

It was a victory which scarcely seemed possible with Williams going into the fight with questions hanging over his mental strength.

But Williams answered his critics emphatically and the manner of victory will not only curtail Tyson's career but send the unassuming Londoner surging towards superstardom.

Williams clung on bravely through a torrid first round. Tyson landed a crashing four-punch combination which ended with a left hook which wobbled Williams.

The Briton did brilliantly to hold on under more Tyson pressure with Tyson almost entirely reliant on crashing left uppercuts.

Williams wobbled his way back to the corner at the end of the first round but he had already exceeded many expectations.

That was not enough for Williams who went on the attack early in the second and landed a superb straight left which briefly stopped Tyson in his tracks.

As the crowd roared their approval Williams then came off equal again following a frantic exchange. Williams was exceeding expectations but was deducted a point by referee Alfred early in the third following a clash which left Tyson cut over his right eye. But after another exchange Williams was cautioned again for apparently punching low.

Tyson tried to step things up at the start of the fourth with a swinging hook from either hand but his clean work diminished as both men tired through the fourth.

Williams stepped it up in the fourth and fashioned what is simply a boxing fairytale by knocking the ex-champion flat.

CAPTION(S):

IT'S ALL OVER: Mike Tyson slumps to the canvas after being sensationally knocked out by Brixton heavyweight Danny Williams in the fourth round of last night's contest