Carlos Reutemann, in a Williams, won the Belgian Grand Prix in Zolder by 36 seconds over Jacques Laffite in a Talbot-Ligier. Reutemann's average speed for 55 laps of the 2.6-mile course was 119.48 mph.
Bobby Unser, in a Penske PC-9B, won the pole position for the Indianapolis 500 with a 4-lap average qualifying run of 200.545 mph at the Indianapolis Motor Speedway. Mike Mosley qualified second at 197.141 mph, and A.J. Foyt was third at 196.078.
ROAD RACING—CRAIG VIRGIN finished first among 27,300 official entrants in the 7.63-mile Bay to Breakers race in San Francisco with a time of 35:07, four seconds under his own course record. JANET OEHM was the women's winner in 41:47.
SOCCER—NASL: Several teams tried new twists to fight sagging attendance. Northwest Division-leading Portland chopped $2.50 off its general admission ticket prices and drew 10,510—more than twice the crowd for the Timbers' previous home NASL game—to a 2-0 win over Calgary. Dale Mitchell and John Bain, the league's fourth- and fifth-leading scorers, respectively, each had a goal, and Stuart Lee, the No. 6 scorer, had an assist. California made its game against San Jose the opening act for a Beach Boys concert, thus attracting 25,230 fans, but lost to the Earthquakes 2-1 as George Best collected a goal and an assist. The Cosmos, whose attendance is down almost 6,000 per game from last year's average of 42,805, padded their Eastern Division lead by beating Tulsa 2-1 on a pair of goals by Giorgio Chinaglia, and helped their gate by playing another first-place team, the Chicago Sting. As 42,385 in Giants Stadium watched, Chinaglia scored a penalty-kick goal, but that wasn't enough as the Cosmos bowed to the Central Division leaders 3-2 in overtime. Neill Roberts and Mike Connell scored shoot-out goals for Tampa Bay in the Rowdies' 1-0 victory over the Southern Division's top team, Fort Lauderdale.
ASL: With a 3-1 win over Cleveland in which Ken McDonald scored twice, Pennsylvania regained sole possession of the Liberty Conference lead. Earlier in the week the Stoners had fallen into a tie for first with New England by losing 2-1 to Freedom Conference leader Carolina while the Sharks were beating Rochester 4-0 behind Steve Reid's three unassisted goals.
TENNIS—PETER McNAMARA upset Jimmy Connors 7-5, 6-1, 4-6, 6-4 to win the $200,000 German Open in Hamburg.
Brian Teacher won the men's title at a $200,000 tournament in Tokyo by beating Bill Scanlon 2-6, 6-1, 7-6. ANDREA JAEGER defeated Tracy Austin 3-6, 6-3, 7-6 to take the women's final.
Dick Stockton defeated Roscoe Tanner 6-3, 6-2 in the finals of a $110,000 tournament in Tulsa.
Chris Evert Lloyd won the finals of the $100,000 Swiss Open in Lugano 6-1, 6-1 over Virginia Ruzici.
Southern Illinois-Edwardsville won its fourth straight NCAA Division II championship, in Little Rock, Ark. SIUE's Ken Flach won the singles title.