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 in straight sets. She won the German Open three consecutive years from 1972 through 1974, beating Martina Navratilova in the 1974 final, in three sets. Masthoff was the runner-up at that tournament in 1971, losing to Billie Jean King.

Margaret Court, also known as Margaret Smith Court, is an Australian former world No. 1 tennis player and a Christian minister. Considered one of the greatest tennis players of all time, her 24 women's singles major titles and total of 64 major titles are the most in tennis history.