Wendy Turnbull, (born 26 November 1952) is an Australian former tennis player. During her career, she won nine Grand Slam titles, four of them in women's doubles and five of them in mixed doubles. She also was a three-time Grand Slam runner-up in singles and won 11 singles titles and 55 doubles titles.

Career Turnbull turned professional in 1975. Her career high rankings were third in singles and fifth in doubles. She was ranked in the year-end world top 20 for 10 consecutive years (1977 through 1986) and in the year-end world top 10 for eight consecutive years from 1977 to 1984. She was nicknamed "Rabbit" by her peers because of her foot speed around the court.

Turnbull was a singles runner-up at the 1977 US Open, the 1979 French Open, and the 1980 Australian Open. She won four women's doubles titles and five mixed doubles titles at Grand Slam events.

She was a 12-time runner-up in Grand Slam doubles events: 11 times in women's doubles and one time in mixed doubles. Nine of her 11 women's doubles losses were to teams that included Martina Navratilova.

Turnbull teamed with Elizabeth Smylie to win the bronze medal in women's doubles at the 1988 Summer Olympics in Seoul. She is one of very few players to have a winning record against Steffi Graf (2–1 in head-to-head matches).

Turnbull was a member of Australia's Fed Cup team from 1977 through 1988, compiling a 46–16 overall win–loss record (17–8 in singles and 29–8 in doubles). She was the captain or coach of the team from 1985 to 1993.

In 1979, the Supersisters trading card set was produced and distributed; one of the cards featured Turnbull's name and picture.

Turnbull was appointed to the International Tennis Federation (ITF) Olympic Committee in 1991, the only player appointed to the committee. She also serves on the ITF's Fed Cup Committee.

Wendy Turnbull was made a Member of the Order of the British Empire in 1984. In December 1993, the city of Brisbane named a public park in her honour. She was inducted into the Australian Tennis Hall of Fame in 2009.Australian Tennis Hall of Fame Inducts Turnbull WTATour.com, 26 January 2009

Significant finals Grand Slam finals Singles: 3 (3 runner-ups) ResultYearChampionshipSurfaceOpponentScore Loss 1977 US Open Clay Chris Evert 7–6(7–3), 6–2 Loss 1979 French Open Clay Chris Evert 6–2, 6–0 Loss 1980 Australian Open Grass Hana Mandlíková 6–0, 7–5

Doubles: 15 (4 titles, 11 runner-ups) ResultYearChampionshipSurfacePartnerOpponentsScore Win 1978 Wimbledon Grass Kerry Melville Reid Mima Jaušovec Virginia Ruzici 4–6, 9–8(12–10), 6–3 Loss 1978 US Open Hard Kerry Melville Reid Billie Jean King Martina Navratilova 7–6, 6–4 Win 1979 French Open Clay Betty Stöve Françoise Dürr Virginia Wade 3–6, 7–5, 6–4 Loss 1979 Wimbledon Grass Betty Stöve Billie Jean King Martina Navratilova 5–7, 6–3, 6–2 Win 1979 US Open Hard Betty Stöve Billie Jean King Martina Navratilova 7–5, 6–3 Loss 1980 Wimbledon Grass Rosie Casals Kathy Jordan Anne Smith 4–6, 7–5, 6–1 Loss 1981 US Open Hard Rosie Casals Kathy Jordan Anne Smith 6–3, 6–3 Loss 1982 French Open Clay Rosie Casals Martina Navratilova Anne Smith 6–3, 6–4 Win 1982 US Open Hard Rosie Casals Barbara Potter Sharon Walsh 6–4, 6–4 Loss 1983 Wimbledon Grass Rosie Casals Martina Navratilova Pam Shriver 6–2, 6–2 Loss 1983 Australian Open Grass Anne Hobbs Martina Navratilova Pam Shriver 6–4, 6–7, 6–2 Loss 1984 US Open Hard Anne Hobbs Martina Navratilova Pam Shriver 6–2, 6–4 Loss 1986 Wimbledon Grass Hana Mandlíková Martina Navratilova Pam Shriver 6–1, 6–3 Loss 1986 US Open Hard Hana Mandlíková Martina Navratilova Pam Shriver 6–4, 3–6, 6–3 Loss 1988 Australian Open Hard Chris Evert Martina Navratilova Pam Shriver 6–0, 7–5

Mixed doubles: 6 (5 titles, 1 runner-up) ResultYearChampionship SurfacePartnerOpponentsScore Win 1979 French Open Clay Bob Hewitt Virginia Ruzici Ion Țiriac 6–3, 2–6, 6–3 Win 1980 US Open Hard Marty Riessen Betty Stöve Frew McMillan 7–5, 6–2 Win 1982 French Open Clay John Lloyd Cláudia Monteiro Cássio Motta 6–2, 7–6 Loss 1982 Wimbledon Grass John Lloyd Anne Smith Kevin Curren 2–6, 6–3, 7–5 Win 1983 Wimbledon Grass John Lloyd Billie Jean King Steve Denton 6–7(5–7), 7–6(7–5), 7–5 Win 1984 Wimbledon Grass John Lloyd Kathy Jordan Steve Denton 6–3, 6–3

Olympics Doubles ResultYearLocation SurfacePartnerOpponentsScore Bronze1988SeoulHard Elizabeth SmylieTiedDNP Smylie and Turnbull lost in the semifinals to Pam Shriver and Zina Garrison. In 1988, there was no bronze medal play off match, both beaten semifinal pairs received bronze medals.

Year-end championships finals Doubles: 2 (1 title, 1 runner-up) ResultYearLocationSurfacePartnerOpponentsScore Loss 1980 New York Carpet (i) Rosemary Casals Billie Jean King Martina Navratilova 6–3, 4–6, 6–3 Win 1986 New York Carpet (i) Hana Mandlíková Claudia Kohde Helena Suková 6–4, 6–7(4–7), 6–3

WTA career finals Singles: 31 (11–20) Winner – LegendGrand Slam tournaments (0–3)WTA Tour Championships (0–0)Virginia Slims, Avon, other (11–17)Finals by surfaceHard (2–5)Grass (3–7)Clay (2–3)Carpet (4–5) ResultNo.DateTournamentSurfaceOpponentScoreWin 1. May 1973 Surbiton, UK Grass Ann Kiyomura 6–2, 6–0Win 2. Jul 1976 Kitzbühel, Austria Clay Virginia Ruzici 6–4, 5–7, 6–3Win 3. Nov 1976 Tokyo, Japan Clay Michele Gurdal 6–1, 6–1Loss 1. Aug 1977 US Open Clay Chris Evert 6–7(3–7), 2–6Loss 2. Oct 1977 Phoenix, US Hard Billie Jean King 6–1, 1–6, 0–6Loss 3. Nov 1977 Melbourne, Australia Grass Evonne Goolagong 4–6, 1–6Loss 4. Jan 1978 Hollywood, US Carpet (i) Evonne Goolagong 2–6, 3–6Loss 5. Dec 1978 Sydney, Australia Grass Dianne Fromholtz 2–6, 5–7Win 4. Feb 1979 Detroit, US Carpet (i) Virginia Ruzici 7–5, 1–6, 7–6(7–4)Win 5. Mar 1979 Philadelphia, US Carpet (i) Virginia Wade 5–7, 6–3, 6–2Loss 6. May 1979 French Open Clay Chris Evert-Lloyd 2–6, 0–6Loss 7. Sep 1979 Atlanta, US Carpet (i) Martina Navratilova 6–7(6–8), 4–6Loss 8. Nov 1979 Melbourne, Australia Grass Hana Mandlíková 3–6, 2–6Loss 9. Jun 1980 Eastbourne, UK Grass Tracy Austin 6–7(3–7), 2–6Loss 10. Jul 1980 San Diego, US Hard Tracy Austin 1–6, 3–6Loss 11. Sep 1980 Atlanta, US Carpet (i) Hana Mandlíková 3–6, 5–7Loss 12. Oct 1980 Phoenix, US Hard Regina Maršíková 6–7, 6–7Win 6. Nov 1980 Hong Kong Hard Marcie Louie 6–0, 6–2Loss 13. Nov 1980 Australian Open Grass Hana Mandlíková 0–6, 5–7Win 7. Dec 1980 Sydney, Australia Grass Pam Shriver 3–6, 6–4, 7–6(10–8)Win 8. Nov 1981 Hong Kong Hard Sabina Simmonds 6–3, 6–4Loss 14. Jan 1982 Chicago, US Carpet (i) Martina Navratilova 4–6, 1–6Loss 15. Mar 1982 Boston, US Carpet (i) Kathy Jordan 5–7, 6–1, 4–6Loss 16. Apr 1982 Orlando, US Clay Martina Navratilova 2–6, 5–7Win 9. Nov 1982 Brisbane, Australia Grass Pam Shriver 6–3, 6–1Win 10. Dec 1982 Richmond, US Carpet (i) Tracy Austin 6–7(3–7), 6–4, 6–2Win 11. Mar 1983 Boston, US Carpet (i) Sylvia Hanika 6–4, 3–6, 6–4Loss 17. Jun 1983 Eastbourne, UK Grass Martina Navratilova 1–6, 1–6Loss 18. Nov 1983 Brisbane, Australia Grass Pam Shriver 4–6, 5–7Loss 19. Oct 1984 Los Angeles, US Hard Chris Evert-Lloyd 2–6, 3–6Loss 20. Apr 1985 San Diego, US Hard Annabel Croft 0–6, 6–7(5–7)

Doubles: 110 (55–55) Winner – LegendGrand Slam tournaments (4–11)WTA Championships (1–1)Tier I (0–0)Tier II (1–1)Tier III (0–0)Tier IV (0–2)Tier V (0–0)Virginia Slims, Avon, other (49–40)Finals by surfaceHard (10–16)Grass (12–11)Clay (12–8)Carpet (21–20)