Frank Bruno knocked down Joe Bugner near the end of the eighth round to stop the Australian in their scheduled 12-round heavyweight bout in London. Bruno, a 25-year-old Briton, easily outclassed the 37-year-old Bugner -- who was returning to a British ring for the first time in 4 1/2 years -- in gaining his 32nd victory in 34 fights.

The win helped Bruno's chances of a earning a matchup with undisputed world champion Mike Tyson, whose comanager, Jim Jacobs, was at ringside for the fight.

The fight was staged before 32,000 fans at White Hart Lane soccer stadium and was Britain's biggest-grossing sporting event ever, with revenues estimated at $5 million . . .

After watching Sumbu Kalambay of Italy win a share of the middleweight title in a bout in Livorno, Italy, former champion Marvelous Marvin Hagler proposed a unification series that he hopes would end with him (Hagler) regaining the undisputed crown.

Hagler dominated the 160-pound division from 1980 until last April, when he lost a controversial split decision to Sugar Ray Leonard. Leonard quickly announced his retirement, leaving the World Boxing Association, World Boxing Council and International Boxing Federation titles vacant.

Friday, the WBA title was claimed by Kalambay, who defeated Iran Barkley in a 15-round decision. Frank Tate holds the IBF title and Thomas Hearns will fight Argentine Juan Roldan for the WBC championship in Las Vegas Oct. 29 . . .

Ken Adams, boxing coach for the U.S. Army team at Ft. Hood in Texas, was named coach of the 1988 U.S. Olympic Games team. Adams, 47, was selected by the U.S. Amateur Boxing Federation at its meeting in Tulsa.

TENNIS