A Roundup of the Week Sept. 14-20

BASKETBALL—Former NBA star Bob McAdoo scored a game-high 25 points to lead European champion TRACER of Milan to a 100-84 victory over Barcellona for the Intercontinental Cup title, in Milan. Tracer will participate in a three-team round-robin tournament with the Soviet national squad and the NBA Milwaukee Bucks next month in Milwaukee.

BOATING—At the Thunderboat Regatta in San Diego, CHIP HANAUER won the Gold Cup, unlimited hydroplane racing's oldest trophy, for a record sixth straight year by averaging 128.081 mph for six laps on the 2½-mile Mission Bay course.

PRO FOOTBALL—The New York Giants became the first Super Bowl champions since the 1982 San Francisco 49ers to open their title defense with two defeats, when they lost 16-14 to Dallas at the Meadowlands six days after their 34-19 Monday night beating in Chicago. USFL refugee Roger Ruzek kicked three field goals for the Cowboys, while Raul Allegre with :06 left missed a 46-yarder that could have salvaged a win for the Giants. The Bears sank Tampa Bay 20-3 in Soldier Field, as Walter Payton broke Jim Brown's record for career rushing touchdowns by scoring his 107th. In Atlanta, the Falcons stunned Washington 21-20, while Philadelphia's defense forced five turnovers and made three sacks in a 27-17 home win over New Orleans. Minnesota, San Francisco and Buffalo all earned last-second victories. The Vikes beat the Rams 21-16 in Anaheim on Wade Wilson's 41-yard touchdown pass to Hassan Jones with :30 left. Houston lost 34-30 at Buffalo when the Bills' Jim Kelly tossed a 10-yard pass to Ronnie Harmon with :57 to play. The 49ers rallied to defeat the Bengals 27-26 in Cincinnati as Joe Montana threw a 25-yard TD strike to Jerry Rice while time expired. The Dolphins won 23-10 at Indianapolis to extend their league record for consecutive victories over one team to 14. The Colts haven't beaten Miami since 1980. Cleveland hammered visiting Pittsburgh 34-10 (page 14), while Denver settled for a 17-17 overtime tie with Green Bay in Milwaukee. In San Diego the Chargers held off St. Louis 28-24 despite the heroics of the Cards' Neil Lomax, who completed 32 of 61 passes for 457 yards and three second-half TDs. The Raiders routed the Lions 27-7 in L.A., while the Seahawks rebounded from their embarrassing opening-day loss in Denver to crush the Chiefs 43-14 in Seattle. Five Kansas City turnovers led to 23 of the Seahawks' points, while Norm Johnson booted a club-record five field goals.

GOLF—JAN STEPHENSON shot a final-round 68 for a 72-hole, 11-under-par 277, to win the LPGA Safeco Classic in Kent, Wash., by one stroke over Nancy Lopez. The victor got $33,750.

HARNESS RACING—At the Delaware (Ohio) County Fairgrounds, Dick Stillings guided JAGUAR SPUR ($3.20) to victories in two straight heats to win the Little Brown Jug, the second jewel of pacing's Triple Crown for 3-year-old colts. In the deciding heat, Jaguar Spur, who earned a $124,729 winner's purse, covered the mile in 1:55[3/5] for a 2½-length triumph over Redskin.

Ambro Emerson ($18.40), with Walter Whelan in the sulky, won the Breeders Crown mile pace for older horses at Roosevelt Raceway in a track-record clocking of 1:54. The 4-year-old bay defeated Tucson Hanover by 3½ lengths to win a $179,897 purse.

HOCKEY—Mario Lemieux scored his 11th goal of the series with 1:26 to play in Game 3 to give TEAM CANADA a 6-5 victory over the Soviet Union and the Canada Cup championship, in Hamilton, Ont. (page 12).

HORSE RACING—At Belmont Park, JAVA GOLD ($3.40), ridden by Pat Day, won the Marlboro Cup by 2¼ lengths over Nostalgia Star to earn the $450,000 winner's purse. Java Gold's lime for the 1¼ miles was 2:01 (page 56).

Cryptoclearance ($5.60), ridden by Jose Santos, triumphed in the Pegasus Handicap at the Meadowlands by 3½ lengths over Lost Code. The 3-year-old covered 1‚Äö√Ñ√∂‚àö√±‚àö¬µ miles in 1:48[3/5] to get the $180,000 winner's purse.

MOTOR SPORTS—ALAIN PROST of France, in a McLaren-TAG, won his 28th Grand Prix event, the Portuguese Grand Prix in Estoril, to surpass Jackie Stewart of Scotland as the winningest Formula One racer ever. Prost completed 70 laps on the 2.703-mile Autodrome course in 1 hour, 37 minutes. 3.906 seconds, 20.493 seconds faster than runner-up Gerhard Berger of Austria, in a Ferrari.

Michael Andretti guided his March-Cosworth to victory in the 200-lap Bosch Grand Prix in Nazareth, Pa. Andretti, who is second to Bobby Rahal in the CART-PPG Indy Car standings, averaged 129.026 mph on the one-mile Pennsylvania International Speedway oval to beat Rahal, in a Lola-Cosworth, by more than a lap.

Ricky Rudd, in a Ford, won his second consecutive NASCAR Delaware 500 title in Dover with a two-second victory over Davey Allison, also in a Ford. Rudd, who averaged a record 124.706 mph on the one-mile Dover Downs International Speedway oval, won $54,550.

RHYTHMIC GYMNASTICS—At the world championships in Varna, Bulgaria, BIANCA PANOVA, 17, of Bulgaria, became the first contestant ever to win all five gold medals in the individual events when she received perfect scores of 10 in the four floor exercises—skipping rope, hoop, clubs and 18-foot-long flowing ribbon—as well as the overall competition.

TENNIS—GABRIELA SABATINI of Argentina, the No. 1 seed, defeated No. 2 seed Manuela Maleeva of Bulgaria 6-4, 7-6 to win the Pan Pacific Open championship and $50,000, in Tokyo.

Unseeded CLAUDIO MEZZADRI of Switzerland won his first Grand Prix event, the Geneva Open, by upsetting his doubles partner, Tomas Smid of Czechoslovakia, 6-4, 7-5, in the finals.

WATERSKIING—At the world championships in Surrey, England, SAMMY DUVALL of the U.S. clinched the men's overall title when he won the jump competition with a meet-record leap of 200 feet. DEENA BRUSH of the U.S. won both the women's jump and overall titles, while compatriots BOB LAPOINT and KIM LASKOFF took the men's and women's slaloms, respectively.

YACHTING—PETER GILMOUR of Australia, a helmsman for Kookaburra III in the America's Cup, beat two-time defending champion Gary Jobson of the U.S. by 3:01 in the deciding race, to win the best-of-three Liberty Cup Regatta for matched 30-foot sloops, 2-1, in New York Harbor.

MILEPOSTS—RETIRED: MANILA, the 4-year-old colt who won the 1986 Eclipse Award as the country's top male turf horse, to stud because of a fractured bone in his left foreleg sustained during a workout at Belmont Park. He won 12 of 18 career starts, including a remarkable 11 of 14 on turf, for earnings of $2,692,799, 10th on the alltime list. This year he won four of five starts, including the Budweiser-Arlington Million, and $868,170 in purses.

TRADED: By the California Angels, lefthanded pitcher JOHN CANDELARIA, 33, to the New York Mets, for two minor league pitchers.