Maria Esther Andion Bueno (born 11 October 1939) is a former professional tennis player from Brazil. During her 11-year career (plus a two-year comeback in 1976–77), she won 19 Majortitles (seven singles, 11 women's doubles, one mixed doubles). She was the year-end number-one ranked female player four times. In 1960, Bueno became the first woman ever to win all four Grand Slam double titles in one year (three with Darlene Hard and one with Christine Truman Janes).