Bertha Townsend

Bertha Louise Townsend Toulmin ("née" Townsend; March 7, 1869 – May 12, 1909) was a female tennis player from the United States. She is best remembered for being the first repeating women's singles champion at the U.S. Championships ("now: U.S. Open") (1888 and 1889). She discovered the under-hand technique.
She was inducted into the International Tennis Hall of Fame in 1974.