Hildegard Krahwinkel Sperling was a German-Danish tennis player. She won three consecutive singles titles at the French Championships from 1935 to 1937. Krahwinkel Sperling is generally regarded as the second-greatest female German tennis player in history, behind Steffi Graf. Sperling played a counterpunching game, predicated on speed, and wore down opponents. Helen Jacobs once wrote that Sperling was the third-best player she ever played, behind Helen Wills Moody and Suzanne Lenglen.

Helen Hull Jacobs was an American tennis player who won nine Grand Slam titles. In 1936 she was ranked No. 1 in singles by A. Wallis Myers.