Table:
text: Betty Stöve
Mixed doubles: 13 (4 titles, 9 runner-ups)
Mixed doubles: 13 (4 titles, 9 runner-ups)
Outcome Year_ Championship Surface Partner Opponents_in_the_final Score_in_the_final
Runner-up 1971 US Open Grass Bob Maud Billie Jean King Owen Davidson 6–3, 7–5
Runner-up 1973 French Open Clay Patrice Dominguez Françoise Dürr Jean-Claude Barclay 6–1, 6–4
Runner-up 1975 Wimbledon Grass Allan Stone Margaret Court Marty Riessen 6–4, 7–5
Runner-up 1976 US Open Clay Frew McMillan Billie Jean King Phil Dent 3–6, 6–2, 7–5
Runner-up 1977 Wimbledon Grass Frew McMillan Greer Stevens Bob Hewitt 3–6, 7–5, 6–4
Winner 1977 US Open Clay Frew McMillan Billie Jean King Vitas Gerulaitis 6–2, 3–6, 6–3
Winner 1978 Wimbledon Grass Frew McMillan Billie Jean King Ray Ruffels 6–2, 6–2

Question: Which championship was played with Allan Stone as a partner in mixed: 13 (4 titles, 9 runners-up) Betty Stöve ?

Question: How many different partners played Betty Stöve's mixed doubles 13 4 titles 9 runners-up finals in 1973?