Soon after news of her death, tributes to the tennis star began pouring in on social media sites. She had oral cancer.
But she rated the 1959 Wimbledon singles title as her greatest career achievement.
Beuno has lost her final battle on Friday, June 8 and it caused the reaction of the entire tennis world that respected her and what she achieved. In his authoritative Tennis Encyclopedia, Bud Collins called Ms. Bueno "incomparably balletic and flamboyant" and said she played "with breathtaking boldness and panache".
"She was very courageous", her nephew Pedro Bueno told reporters.
She was later a commentator at major tennis tournaments for Brazilian television.
She successfully defended her Wimbledon crown the following year and claimed back-to-back US Nationals titles in 1963-64.
Bueno and Court faced each other in five major finals, with Bueno winning two of them.
Known for her stylishness and her exciting way of playing, she was the first South American woman to win the Wimbledon singles title.
In 1965, Bueno again won the Wimbledon doubles title, this time with tennis partner Billie Jean King. "She just projected well, and was so graceful with long, flowing strokes".
Maria Esther Bueno was born on October 11, 1939, in São Paulo, and grew up across the street from a tennis club.
As she received the award, she said: "I'm not good, I'm afraid of everyone I play". She learned the sport from her father, a veterinarian and businessman, and from reading books about tennis.
One tennis writer, John Barrett, called her "the elegant queen of Brazilian tennis".
Nicknamed the "Sao Paulo Swallow" for her ability to dominate the net, Bueno was a teen prodigy despite having no formal coaching, according to the International Hall of Fame, which she entered in 1978.
Bueno's career took a downturn as the Open era started in 1968 because of arm and leg injuries.