A roundup of the week July 18-24

AUTO RACING—BOBBY ALLISON took the lead with 143 miles left and easily won the Dixie 500 stock-car race, in Hampton, Ga. (page 44).

Mario Andretti of the U.S. and JACKY ICKX of Belgium drove their Ferrari 312P to victory in the Watkins Glen (N.Y.) Six Hours of Endurance, the 11th and final event in the world manufacturers' championship. They covered the 658.515-mile distance in 6:01:11.3, for an average speed of 109.39 mph. Ferrari swept the manufacturers' title by winning all 10 races it entered, including a one-two finish at Watkins Glen.

BICYCLING—Formidable EDDY MERCKX of Belgium became the second man in history to win the Tour de France four years in a row (page 48).

BOATING—SANDY SATULLO of Cleveland won the Hennessy Grand Prix off Point Pleasant, N.J. in his 36-foot Cigarette, Copper Kettle (page 18).

BOWLING—LEN KAZMIERCZAK of Toledo, Ohio won the $565,000 Peterson Classic at Chicago by rolling an eight-game total of 1,714, five pins ahead of Howie Mahnke of Sheboygan, Wis.

BOXING—MUHAMMAD ALI, the top-ranked heavyweight contender, scored an 11th-round TKO over Al (Blue) Lewis, in Dublin. Near the end of the fifth round Ali scored the bout's only knockdown, but Lewis was saved by the bell.

Tim Dement, a 17-year-old flyweight, Welterweight JESSE VALDEZ, Heavyweight DUANE BOBICK and nine other fighters won their divisions in the U.S. Olympic trials held at Fort Worth (page 21).

CHESS—At the world championships in Reykjavik, Iceland, Bobby Fischer of the United States gained two wins and a draw to take a 3½-2½ lead over defending champion Boris Spassky of the U.S.S.R. In the week's first game, Fischer survived a series of Spassky thrusts to salvage a draw. Spassky blundered on the 27th move of the next game to give Fischer a win. Finally, using an opening he previously had never employed in championship competition, Fischer dominated the week's third game and forced Spassky to resign at the 41st move.

GOLF—BERT YANCEY won the $150,000 American Golf Classic in Akron, Ohio when Tom Ulozas bogeyed the first hole of their sudden-death playoff. They were tied at four-under-par 276 after 72 holes.

HARNESS RACING—SPEEDY CROWN, driven by Howard Beissinger, winner of the $125,000 International Trot at Roosevelt the week before, beat Une de Mai of France and Canada's Fresh Yankee in a $150,000 match race over the same track (page 54).

Nansemond ($15.40), with Herve Filion in the sulky, stopped Albatross' winning streak at 10—all in sub-two-minute miles—when he won the $27,750 Adios Harry Pace in 1:56[1/5] at Wilmington, Del.'s Brandywine Raceway. Albatross finished fourth, with Kentucky and Romano Hanover second and third.

HORSE RACING—HITCHCOCK ($5.60), Carlos H. Marquez up, won the $113,300 Suburban Handicap at Aqueduct by two lengths over West Coast Scout.

Bold Liz ($22.40), ridden by Jorge Teieira, took the $140,500 Hollywood Juvenile Championship for 2-year-olds by a length over Doc Marcus at Hollywood Park.

North Sea ($9.60), under John Ruane, scored a seven-length upset over Preakness winner Bee Bee Bee in the $57,400 Minuteman Handicap at Philadelphia's Liberty Bell Park.

Unbeaten BRIGADIER GERARD won his 15th straight race, the ¬£75,000 King George VI and Queen Elizabeth Stakes, by 1½ lengths over Parnell at Ascot.

PENTATHLON—Army Captain CHARLES RICHARDS of Tacoma, Wash. became the first man ever to win the national championship three years in a row when he totaled 5,212 points, in San Antonio. The victory, which included an American pentathlon record time of 3:23 in the 300-meter swim, earned him a berth on the U.S. Olympic team.

ROWING—National Champion JIM DIETZ of the New York Athletic Club won the Olympic singles trials by 4¾ lengths over Bill Tydus of the Seattle Tennis Club, covering 2,000 meters in 7:39.25 on Connecticut's Lake Waramaug. LARRY HOUGH and DICK LYON of the Stanford (Calif.) Crew Association won the pairs-without-coxswain final by 1¼ lengths over Mark Borchelt and Tom Flammang of the Potomac Boat Club in 7:32.66.

SAILING—CARINA, a 48-foot sloop owned by Richard S. Nye of New York City and skippered by Hank Enos, won the Class B and overall titles in the 2,700-mile Bermuda-to-Bayona (Spain) race in a time of 391:52:39. Jubilee III took Class A, Noryema, winner of this year's Newport-to-Bermuda race, won Class C and Prim led Class D.

Cherokee, a 33-foot sloop from Seattle skippered by William S. Black, won the Victoria-Maui International Yacht race from Victoria, British Columbia to Lahaina, Hawaii with a corrected time of nine days, two hours and 52 minutes.

SWIMMING—LYNNE COX, 15, of Los Alamitos, Calif. set a new record for swimming the English Channel from Dover to France with a time of nine hours, 57 minutes. She beat by 26 minutes the men's mark set by Helge Jensen of Canada in 1960 and by nearly an hour the women's record set by Corrie Ebbelaar of The Netherlands last year.

Mayumi Aoki of Japan clipped two-tenths of a second off the world 100-meter butterfly record for women with a clocking of 1:03.9 in Tokyo.

TENNIS—The UNITED STATES won the American Zone Davis Cup final when the doubles team of Stan Smith and Erik Van Dillen defeated Chile's Jaime Fillol and Patricio Cornejo 6-2, 6-4, 4-6, 3-6, 6-3 in Santiago.

TRACK & FIELD—LYUDMILA BRAGINA of the U.S.S.R. broke the world record for the women's 1,500-meter run by 2.7 seconds with a 4:06.9 clocking at the Soviet championships in Moscow.

The ITALIAN NATIONAL TEAM clipped two-tenths of a second off Texas A&M's 1970 world record for the 800-meter relay with a time of 1:21.5 in Barletta, Italy.

MILEPOSTS—EXEMPTED: Professional athletes, from the Pay Board regulations, by the Cost of Living Council.

INJURED: Quarterback ROMAN GABRIEL, 31, of the Los Angeles Rams, whose right lung collapsed during a team workout. He is expected to miss a month of preseason play.

NAMED: As head coach of the National Hockey League's New York Islanders, PHIL GOYETTE, 38, who spent 16 seasons as an NHL center.

RETIRED: BART STARR, 38, after 16 years as quarterback with the Green Bay Packers. Starr guided the Packers to five league and six divisional championships. He completed 1,808 of 3,149 passes for a .574 percentage and in 1964-65 made 294 consecutive passes without an interception, both league records.

SIGNED: J.C. TREMBLAY, 33, a 12-year defenseman with the NHL's Montreal Canadiens, to play with Les Nordiques, the WHA's Quebec City franchise.

SIGNED: Guard JERRY WEST, 34, of the NBA's Los Angeles Lakers, for two seasons at an estimated $300,000 a year.