Coming Events August 20 Through 26

Tennis
Canada vs. Mexico , Davis Cup North American Zone semifinal, Mexico City .

SATURDAY, AUGUST 21

Auto Racing
NASCAR American Le Mans 12-hour endurance race, for sports cars and stocks, Linden Airport, N.J.

Cycling
World championships begin, Solingen, Germany . Thirty-one nations entered.

Football

San Francisco 49ers vs. Washington Redskins (exhibition), Sacramento , Calif. , 8 p.m. P.D.T.
New York Giants vs. Chicago Cardinals (exhibition), Spokane , Wash., 8 p.m. P.D.T.
Green Bay Packers vs. Cleveland Browns (exhibition), Green Bay , Wis. , 8 p.m. C.D.T.

Golf
Natl. Amputee tournament, Red Run G.C., Royal Oak , Mich.

Horse Racing

American Derby, $100,000, 1? m., 3 yr. olds, Washington Pk., Homewood , Ill.
[TELEVISED EVENTS]Whitney Handicap, $50,000, 1� m., 3 yr. olds up, Saratoga Springs , N.Y., 5 p.m. ( CBS )
Ventnor Handicap, $30,000, 1? m., 3 yr. olds, Atlantic City , N.J.
San Diego Handicap, $10,000, 1[1/16] m., 3 yr. olds up, Del Mar , Calif.

Motorboating
Billop Trophy, 51-mile predicted log race, Great Kills, Staten Island , N.Y.