Althea Gibson won the Wimbledon Women's singles final in 1957 and 1958 and the doubles title in 1956-58.
Arthur Ashe was the only Black person from any era to win the Australian, US Open and Wmbledon. He won Wimbledon in 75 though and not 57. He beat Jimmy Connors in 4 sets.
Pete Sampras has the most Wimbledon men's singles titles with 7.
Bjorn Rune Borg; the Swedish player won the Wimbledon Men's Singles Title consecutively from 1976 to 1980.
Althea Gibson was a champion tennis player. In 1956 she won the French Open in both singles and doubles. Gibson became the leading women's tennis player in the world. In 1957 and 1958 she won both the Wimbledon and U.S. National singles titles, becoming the first African American to win a Wimbledon singles title. After she won the 1958 titles, she retired from tennis and played professional golf. She was elected to the International Tennis Hall of Fame in 1971.
John McEnroe, 1981.