The leading player of the 1970s, Gretchen Spruance came from the Wilmington Country Club. Her mother, Bunny Vosters, was a major doubles players with eleven national titles, and her sister, Nina Moyer, won two nationals. After losing to her sister in the finals in 1972, Spruance never lost again in the nationals, taking five titles. On the doubles court, she teamed with her mother to win five titles, and with Kit Spahr to win two mixed titles.
National Champion 1973, 1974, 1976, 1977, 1978
National Doubles Champion 1972, 1973, 1974, 1976, 1977
National Mixed Doubles Champion 1970, 1971