Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Outcome | Year | Championship | Surface | Partner | Opponents in the final | Score in the final |
| --- | --- | --- | --- | --- | --- | --- |
| Runner-up | 1971.0 | US Open | Grass | Bob Maud | Billie Jean King Owen Davidson | 6–3, 7–5 |
| Runner-up | 1973.0 | French Open | Clay | Patrice Dominguez | Françoise Dürr Jean-Claude Barclay | 6–1, 6–4 |
| Runner-up | 1975.0 | Wimbledon | Grass | Allan Stone | Margaret Court Marty Riessen | 6–4, 7–5 |
| Runner-up | 1976.0 | US Open | Clay | Frew McMillan | Billie Jean King Phil Dent | 3–6, 6–2, 7–5 |
| Runner-up | 1977.0 | Wimbledon | Grass | Frew McMillan | Greer Stevens Bob Hewitt | 3–6, 7–5, 6–4 |
| Winner | 1977.0 | US Open | Clay | Frew McMillan | Billie Jean King Vitas Gerulaitis | 6–2, 3–6, 6–3 |
| Winner | 1978.0 | Wimbledon | Grass | Frew McMillan | Billie Jean King Ray Ruffels | 6–2, 6–2 |
| Winner | 1978.0 | US Open (2) | Hard | Frew McMillan | Billie Jean King Ray Ruffels | 6–3, 7–6 |
| Runner-up | 1979.0 | Wimbledon | Grass | Frew McMillan | Greer Stevens Bob Hewitt | 7–5, 7–6 |
| Runner-up | 1979.0 | US Open | Hard | Frew McMillan | Greer Stevens Bob Hewitt | 6–3, 7–5 |
| Runner-up | 1980.0 | US Open | Hard | Frew McMillan | Wendy Turnbull Marty Riessen | 7–5, 6–2 |
| Runner-up | 1981.0 | French Open | Clay | Fred McNair | Andrea Jaeger Jimmy Arias | 7–6, 6–4 |
Question:
How many different partners played in the finale in 1973?
Answer:
1.0