Helga Niessen Masthoff is a former tennis player from West Germany. Her best Grand Slam singles tournament was when she reached the 1970 French Open final, losing to Margaret Court 62, 64. She won the German Open three consecutive years from 1972 through 1974, beating Martina Navratilova in the 1974 final 64, 57, 63. Masthoff was the runnerup at that tournament in 1971, losing to Billie Jean King 63, 62.
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Source: Wikipedia