2014 -- Petra Kvitova def. Eugenie Bouchard, 6-3, 6-0.
2013 -- Marion Bartoli def. Sabine Lisicki, 6-1, 6-4.
2012 -- Serena Williams def. Agnieszka Radwanska, 6-1, 5-7, 6-2.
2011 -- Petra Kvitova def. Maria Sharapova, 6-3, 6-4.
2010 -- Serena Williams def. Vera Zvonareva, 6-3, 6-2.
2009 -- Serena Williams def. Venus Williams, 7-6 (3), 6-2.
2008 -- Venus Williams def. Serena Williams, 7-5, 6-4.
2007 -- Venus Williams def. Marion Bartoli, 6-4, 6-1.
2006 -- Amelie Mauresmo def. Justine Henin-Hardenne, 2-6, 6-3, 6-4.
2005 -- Venus Williams def. Lindsay Davenport, 4-6, 7-6 (4), 9-7.
2004 -- Maria Sharapova def. Serena Williams, 6-1, 6-4.
2003 -- Serena Williams def. Venus Williams, 4-6, 6-4, 6-2.
2002 -- Serena Williams def. Venus Williams, 7-6 (4), 6-3.
2001 -- Venus Williams def. Justine Henin, 6-1, 3-6, 6-0.
2000 -- Venus Williams def. Lindsay Davenport, 6-3, 7-6 (3).
1999 -- Lindsay Davenport def. Steffi Graf, 6-4, 7-5.
1998 -- Jana Novotna def. Nathalie Tauziat, 6-4, 7-6 (2).
1997 -- Martina Hingis def. Jana Novotna, 2-6, 6-3, 6-3.
1996 -- Steffi Graf def. Arantxa Sanchez Vicario, 6-3, 7-5.
1995 -- Steffi Graf def. Arantxa Sanchez Vicario, 4-6, 6-1, 7-5.
1994 -- Conchita Martinez def. Martina Navratilova, 6-4, 3-6, 6-3.
1993 -- Steffi Graf def. Jana Novotna, 7-6 (6), 1-6, 6-4.
1992 -- Steffi Graf def. Monica Seles, 6-2, 6-1.
1991 -- Steffi Graf def. Gabriela Sabatini, 6-4, 3-6, 8-6.
1990 -- Martina Navratilova def. Zina Garrison, 6-4, 6-1.
1989 -- Steffi Graf def. Martina Navratilova, 6-2, 6-7 (1), 6-1.
1988 -- Steffi Graf def. Martina Navratilova, 5-7, 6-2, 6-1.
1987 -- Martina Navratilova def. Steffi Graf, 7-5, 6-3.
1986 -- Martina Navratilova def. Hana Mandlikova, 7-6 (1), 6-3.
1985 -- Martina Navratilova def. Chris Evert Lloyd, 4-6, 6-3, 6-2.
1984 -- Martina Navratilova def. Chris Evert Lloyd, 7-6 (5), 6-2.
1983 -- Martina Navratilova def. Andrea Jaeger, 6-0, 6-3.
1982 -- Martina Navratilova def. Chris Evert Lloyd, 6-1, 3-6, 6-2.
1981 -- Chris Evert Lloyd def. Hana Mandlikova, 6-2, 6-2.
1980 -- Evonne Goolagong Cawley def. Chris Evert Lloyd, 6-1, 7-6 (4).
1979 -- Martina Navratilova def. Chris Evert Lloyd, 6-4, 6-4.
1978 -- Martina Navratilova def. Chris Evert, 2-6, 6-4, 7-5.
1977 -- Virginia Wade def. Betty Stove, 4-6, 6-3, 6-1.
1976 -- Chris Evert def. Evonne Goolagong Cawley, 6-3, 4-6, 8-6.
1975 -- Billie Jean King def. Evonne Goolagong Cawley, 6-0, 6-1.
1974 -- Chris Evert def. Olga Morozova, 6-0, 6-4.
1973 -- Billie Jean King def. Chris Evert, 6-0, 7-5.
1972 -- Billie Jean King def. Evonne Goolagong, 6-3, 6-3.
1971 -- Evonne Goolagong def. Margaret Smith Court, 6-4, 6-1.
1970 -- Margaret Court def. Billie Jean King, 14-12, 11-9.
1969 -- Ann Haydon Jones def. Billie Jean King, 3-6, 6-3, 6-2.
1968 -- Billie Jean King def. Judy Tegart, 9-7, 7-5.
1967 -- Billie Jean King def. Ann Haydon Jones, 6-3, 6-4.
1966 -- Billie Jean King def. Maria Bueno, 6-3, 3-6, 6-1.
1965 -- Margaret Smith def. Maria Bueno, 6-4, 7-5.
1964 -- Maria Bueno def. Margaret Smith, 6-4, 7-9, 6-3.
1963 -- Margaret Smith def. Billie Jean Moffitt, 6-3, 6-4.
1962 -- Karen Hantze Susman def. Vera Sukova, 6-4, 6-4.
1961 -- Angela Mortimer def. Christine Truman, 4-6, 6-4, 7-5.
1960 -- Maria Bueno def. Sandra Reynolds, 8-6, 6-0.
1959 -- Maria Bueno def. Darlene Hard, 6-4, 6-3.
1958 -- Althea Gibson def. Angela Mortimer, 8-6, 6-2.
1957 -- Althea Gibson def. Darlene Hard, 6-3, 6-2.
1956 -- Shirley Fry def. Angela Buxton, 6-3, 6-1.
1955 -- Louise Brough def. Beverly Baker Fleitz, 7-5, 8-6.
1954 -- Maureen Connolly def. Louise Brough, 6-2, 7-5.
1953 -- Maureen Connolly def. Doris Hart, 8-6, 7-5.
1952 -- Maureen Connolly def. Louise Brough, 7-5, 6-3.
1951 -- Doris Hart def. Shirley Fry, 6-1, 6-0.
1950 -- Louise Brough def. Margaret Osborne duPont, 6-1, 3-6, 6-1.
1949 -- Louise Brough def. Margaret Osborne duPont, 10-8, 1-6, 10-8.
1948 -- Louise Brough def. Doris Hart, 6-3, 8-6.
1947 -- Margaret Osborne def. Doris Hart, 6-2, 6-4.
1946 -- Pauline Betz def. Louise Brough, 6-2, 6-4.
1940-45 -- No tournament, World War II
1939 -- Alice Marble def. Kay Stammers, 6-2, 6-0.
1938 -- Helen Wills Moody def. Helen Jacobs, 6-4, 6-0.
1937 -- Dorothy Round def. Jadwiga Jedrzejowska, 6-2, 2-6, 7-5.
1936 -- Helen Jacobs def. Hilde Krahwinkel Sperling, 6-2, 4-6, 7-5.
1935 -- Helen Wills Moody def. Helen Jacobs, 6-3, 3-6, 7-5.
1934 -- Dorothy Round def. Helen Jacobs, 6-2, 5-7, 6-3.
1933 -- Helen Wills Moody def. Dorothy Round, 6-4, 6-8, 6-3.
1932 -- Helen Wills Moody def. Helen Jacobs, 6-3, 6-1.
1931 -- Cilly Aussen def. Hilde Krahwinkel, 6-2, 7-5.
1930 -- Helen Wills Moody def. Elizabeth Ryan, 6-2, 6-2.
1929 -- Helen Wills def. Helen Jacobs, 6-1, 6-2.
1928 -- Helen Wills def. Lili de Alvarez, 6-2, 6-3.
1927 -- Helen Wills def. Lili de Alvarez, 6-2, 6-4.
1926 -- Kitty McKane Godfree def. Lili de Alvarez, 6-2, 4-6, 6-3.
1925 -- Suzanne Lenglen def. Joan Fry, 6-2, 6-0.
1924 -- Kitty McKane def. Helen Wills, 4-6, 6-4, 6-4.
1923 -- Suzanne Lenglen def. Kitty McKane, 6-2, 6-2.
1922 -- Suzanne Lenglen def. Molla Bjurstedt Mallory, 6-2, 6-0.
1921 -- Suzanne Lenglen def. Elizabeth Ryan, 6-2, 6-0.
1920 -- Suzanne Lenglen def. Dorothea Douglass Chambers, 6-3, 6-0.
1919 -- Suzanne Lenglen def. Dorothea Douglass Chambers, 10-8, 4-6, 9-7.
1915-18 -- No tournament, World War I
1914 -- Dorothea Douglass Chambers def. Ethel Thomson Larcombe, 7-5, 6-4.
1913 -- Dorothea Douglass Chambers def. Winifred Slocock McNair, 6-0, 6-4.
1912 -- Ethel Thomson Larcombe def. Charlotte Cooper Sterry, 6-3, 6-1.
1911 -- Dorothea Douglass Chambers def. Dora Boothby, 6-0, 6-0.
1910 -- Dorothea Douglass Chambers def. Dora Boothby, 6-2, 6-2.
1909 -- Dora Boothby def. Agnes Morton, 6-4, 4-6, 8-6.
1908 -- Charlotte Cooper Sterry def. Agnes Morton, 6-4, 6-4.
1907 -- May Sutton def. Dorothea Douglass Chambers, 6-1, 6-4.
1906 -- Dorothea Douglass def. May Sutton, 6-3, 9-7.
1905 -- May Sutton def. Dorothea Douglass, 6-3, 6-4.
1904 -- Dorothea Douglass def. Charlotte Cooper Sterry, 6-0, 6-3.
1903 -- Dorothea Douglass def. Ethel Thomson, 4-6, 6-4, 6-2.
1902 -- Muriel Robb def. Charlotte Cooper Sterry, 7-5, 6-1.
1901 -- Charlotte Cooper Sterry def. Blanche Bingley Hillyard, 6-2, 6-2.
1900 -- Blanche Bingley Hillyard def. Charlotte Cooper, 4-6, 6-4, 6-4.
1899 -- Blanche Bingley Hillyard def. Charlotte Cooper, 6-2, 6-3.
1898 -- Charlotte Cooper def. Louise Martin, 6-4, 6-4.
1897 -- Blanche Bingley Hillyard def. Charlotte Cooper, 5-7, 7-5, 6-2.
1896 -- Charlotte Cooper def. Alice Simpson Pickering, 6-2, 6-3.
1895 -- Charlotte Cooper def. Helen Jackson, 7-5, 8-6.
1894 -- Blanche Bingley Hillyard def. Edith Austin, 6-1, 6-1.
1893 -- Lottie Dod def. Blanche Bingley Hillyard, 6-8, 6-1, 6-4.
1892 -- Lottie Dod def. Blanche Bingley Hillyard, 6-1, 6-1.
1891 -- Lottie Dod def. Blanche Bingley Hillyard, 6-2, 6-1.
1890 -- Helena Rice def. M. Jacks, 6-4, 6-1.
1889 -- Blanche Bingley Hillyard def. Helena Rice, 4-6, 8-6, 6-4.
1888 -- Lottie Dod def. Blanche Bingley Hillyard, 6-3, 6-3.
1887 -- Lottie Dod def. Blanche Bingley Hillyard, 6-2, 6-0.
1886 -- Blanche Bingley def. Maud Watson, 6-3, 6-3.
1885 -- Maud Watson def. Blanche Bingley, 6-1, 7-5.
1884 -- Maud Watson def. Lillian Watson, 6-8, 6-3, 6-3.
From 1885 through 1921, a challenge round format was in effect. In the challenge round system, the defending champion played only one match against the winner of an all-comers tournament. When the champion didn't defend, the previous all-comers winner acted as defending "champion."