Las Vegas — Mike Tyson completed his march to heavyweight supremacy on August 1, 1987, outpointing fellow unbeaten Tony Tucker over twelve tactical rounds at the Las Vegas Hilton to become the first fighter since Leon Spinks in 1978 to hold the WBC, WBA, and IBF heavyweight titles simultaneously. Tyson had not long stepped into the ring, having beaten Pinklon Thomas, before fighting Tucker.

Billed as The Ultimate, this clash was the grand finale of HBO’s 16-month, $22 million Heavyweight World Series. Tyson entered the ring as the 11-to-1 betting favourite, already in possession of the WBC and WBA belts, while Tucker had captured the IBF title just nine weeks earlier by stopping Buster Douglas. With Michael Spinks stripped of the IBF crown but still holding the lineal claim, this bout settled the sanctioning bodies’ version of an undisputed champion.

Tucker started sharply, using his height and reach to sting Tyson with quick hooks and uppercuts in the early rounds, winning both the first and third on the scorecards. But Tyson, fighting with characteristic aggression, began to assert himself from the fourth round onward. He worked behind a more consistent jab than in previous bouts, using it to close distance and unleash his trademark combinations to the head and body.

The IBF champion responded with spoiling tactics—clinching, sidestepping, and pushing down on Tyson’s head to disrupt his rhythm. While this slowed the bout’s pace, it couldn’t halt the steady accumulation of Tyson’s scoring blows. By the middle rounds, Tucker’s offense had diminished, and he was largely in survival mode, circling away from Tyson’s power shots.

The final two rounds brought brief drama as Tucker, clearly behind on points, taunted Tyson with dropped hands and exaggerated gestures, daring him to land clean. Tyson remained disciplined, pressing forward and maintaining control to the final bell.

All three judges ruled in Tyson’s favour—Phil Newman 119-111, Julio Roldan 118-113, and Bill Graham 116-112—marking the 21-year-old’s 31st consecutive win and his 12th straight victory in a world title bout. According to CompuBox, Tyson landed 216 of 412 punches (52%), compared to Tucker’s 174 of 452 (39%).

While the bout lacked a knockout, it secured Tyson’s place atop the heavyweight division’s official ranks, even if Spinks remained the man many still considered the “real” champion. And with HBO’s unification series concluded, Tyson’s reign entered a new phase—one where challengers would now be coming for the man holding all three major belts.