Marion Zinderstein twice reached the singles finals of the
U.S. National Championships. In 1919, she defeated reigning champion
Molla Bjurstedt from Norway in the semifinals in straight sets and then lost to compatriot
Hazel Hotchkiss Wightman in the final, 1–6, 2–6. A year later, 1920, Bjurstedt avenged the previous year's semifinal defeat and Zinderstein suffered a heavy loss in the final, 3–6, 1–6. In 1924, she became national singles indoor champion when she defeated
Lillian Scharman, 6–2, 6–3, in the indoor tournament at
Brookline, Massachusetts. She successfully defended the title in 1925, beating Anna Fuller Hubbard in the final. In 1976, she was inducted into the
Delaware Sports Hall of Fame. == Personal ==