California State Championships, Alpine Hills Tennis Club, Portola Valley, Calif.
National Hard Court Championships, La Jolla Beach & Tennis Club, La Jolla, Calif.
National Men's 35 Hard Court Championships, Mill Valley Tennis Club, Mill Valley, Calif.
May 1, 1966
National Interscholastic Championships, Williams College, Williamstown, Mass.
JUNE 27-JULY 4
National Senior and Father & Son Clay Court Championships, Cynwyd Club, Cynwyd, Pa.
National Clay Court Championships, Town Club, Milwaukee.
National Men's 35 Clay Court Championships, Shelter Rock Tennis Club, Manhasset, L.I., N.Y.
National Girls' 16 Championships, Bath & Tennis Club, Lake Bluff, Ill.
JULY 31-AUG. 7
National Junior and Boys' Championships, Kalamazoo College, Kalamazoo, Mich.
National Girls' Intersectional Team Matches. Germantown Cricket Club, Germantown, Pa.
National Junior Grass Court Championships, Tuscaloosa Racquet Club, Tuscaloosa, Ala.
National Girls' 18 Championships, Philadelphia Cricket Club, Philadelphia.
National Doubles Championships, Longwood Cricket Club, Chestnut Hill, Mass.
National Singles Championships, West Side Tennis Club, Forest Hills, N.Y.
SEPT. 29-OCT. 2
National Seniors' 60 Clay Court Championships, Virginia Beach, Va.
SEPT. 30-OCT. 2
All-American Open, Rosemont Tennis Center, Fort Worth.
National Seniors' 55 Clay Court Championships, Knoxville Racquet Club, Knoxville, Tenn.
National Seniors' 55 Hard Court Championships, Hotel Tropicana, Las Vegas.
National Seniors' 55 Grass Court Championships, Tuscaloosa Racquet Club, Tuscaloosa, Ala.
NOV. 30-DEC 4
National Senior Hard Court Championships, La Jolla Beach & Tennis Club, La Jolla, Calif.
Federation Cup (Little Davis Cup), Sporting Club of Turin, Turin, Italy.
MAY 25-JUNE 5
French Hard Court Championships, Paris.
JUNE Date to be announced.
Wightman Cup, Wimbledon, England.
London Open Championships, Queen's Club, London.
JUNE 20-JULY 2
All-England Championships, Wimbledon, England.