A Roundup Of The Week July 1-7

BOXING—Undefeated JULIO CESAR CHAVEZ of Mexico retained his WBC junior lightweight championship with a second-round knockout of Roger Mayweather in Las Vegas.

CREW—At the 146th Henley Royal Regatta, Harvard defeated Princeton by 3? lengths to win the Grand Challenge Cup for elite eights. Britain's Steve Redgrave won the Diamond Challenge for single sculls by four lengths, beating Brad Lewis of the U.S. In the Princess Elizabeth Cup for schoolboy eights, St. Paul's School of Concord, N.H. lost in the final to Britain's Hampton School by one-third of a length.

PRO FOOTBALL—The defending champion Baltimore Stars edged the New Jersey Generals 20-17 in a quarterfinal matchup and advanced to the semis. There they beat the Eastern Conference-leading Stallions in Birmingham 28-14 to gain a place in the finals. Western Conference leader Oakland claimed the other spot in the championship game by defeating Memphis 28-19 (page 58).

GOLF—CURTIS STRANGE shot a nine-under-par 279 to win $86,506 and his third PGA event of the season at the 76th Canadian Open in Oakville, Ont. Jack Nicklaus and Greg Norman tied for second, two strokes back.

Nancy Lopez fired a final-round 68 for a seven-under-par 281 total to beat Allison Finney and JoAnne Carner by three strokes at the Hall of Fame Championship in Sugar Land, Texas. Her first-prize check was worth $45,000.

Seve Ballesteros shot a final-round 69 for a 21-under-par 263 total to win the French Open and $18,375 at St. Germain-en-Laye. Runner-up Sandy Lyle finished two strokes back.

HORSE RACING—MOM'S COMMAND ($3), ridden by Abigail Fuller, beat Bessarabian by 2� lengths to win the Coaching Club American Oaks at Belmont Park. The 3-year-old, which won $142,560, became the sixth horse to win the New York Triple Crown for fillies (page 56).

Vanlandingham ($19.20), with Don MacBeth in the saddle, defeated Carr de Naskra by 8� lengths to win $180,600 in the Suburban Handicap at Belmont Park. The 4-year-old colt covered the 1� miles in 2:01.

Creme Fraiche ($4), Eddie Maple aboard, won the 75th American Derby at Arlington Park by a length over Red Attack. The 3-year-old colt covered the 1� miles in 2:01[3/5] and won a first-place purse of $96,000.

MOTORCYCLING—FREDDIE SPENCER, riding a Honda, beat 1984 world champion Eddie Lawson, on a Yamaha, by five seconds and Carlos Lavado of Venezuela, also on a Yamaha, by 12.7 seconds in 500-cc and 250-cc motorcycling events at the Belgian Grand Prix at Francorchamps. Spencer averaged 103.8 mph in the 500-cc race and 98.2 mph in the 250-cc competition.