HORSE RACING—At Belmont Park, TEJANO ($3.60), with Jacinto Vasquez in the saddle, won the Cowdin for 2-year-olds by 4� lengths over Tsar-baby, covering the seven furlongs in 1:23[2/5] to win $103,320. In the Matron for 2-year-old fillies, OVER ALL ($2.60), with Angel Cordero up, was a 5�-length winner over Justsayno and won $82,140. She ran the seven furlongs in 1:24[4/5].
Trempolino, ridden by Pat Edderly, finished two lengths ahead of Tony Bin and won the 66th Prix de l' Arc de Triomphe at Longchamp in Paris.
MOTOR SPORTS—TERRY LABONTE, driving a Chevrolet, won his first NASCAR event of the season, defeating Dale Earnhardt, also in a Chevrolet, by 5.3 seconds in the Holly Farms 400 in North Wilkesboro, N.C. Labonte averaged 96.051 mph and earned a first prize of $45,575.
SYNCHRONIZED SWIMMING—In Cairo, the U.S. won the team event at the world championships, edging Canada 57-55. CAROLYN WALDO of Canada retained her individual title, defeating 1984 Olympic gold medalist Tracie Ruiz of the U.S. In the duet, Waldo paired with countrywoman MICHELLE CAMERON to beat Karen and Sarah Josephson of the U.S.
TENNIS—PETER LUNDGREN of Sweden beat Jim Pugh of the U.S. to win the Transamerica Open and the $46,400 first prize, in San Francisco.
Chris Evert defeated Lori McNeil 6-3, 7-5 to win a Virginia Slims event and $30,500. in New Orleans.
MILEPOSTS—BARRED: By the International Amateur Athletic Federation, from competition for two years, including the 1988 Summer Olympics, runner SANDRA GASSER, 25, of Switzerland, after she tested positive for steroids at the World Track and Field Championships in Rome last month. Gasser was also stripped of her bronze medal in the 1,500 meters.
DISMISSED: By a municipal court judge in Los Angeles, assault and battery charges against heavyweight champion MIKE TYSON, 21. Tyson had been accused of punching a 20-year-old parking lot attendant during a June 21 scuffle outside the Greek Theatre.
NAMED: As interim basketball coach at Virginia Tech, assistant coach FRANKIE ALLEN, 38. He replaces Charles Moir, 56, who resigned in the wake of an internal inquiry into the Hokies' basketball program that has uncovered 13 alleged NCAA violations. Moir was the winningest coach in Tech history, with a 213-119 record in 11 seasons.
RELEASED: By the Baltimore Orioles, second baseman ALAN WIGGINS, 29. The five-year veteran was suspended by commissioner Peter Ueberroth on Aug. 31 for "improper behavior," after reportedly failing a drug test.