Robert Machan (born 18 October 1948, in Budapest, Hungary), is a former professional tennis player from Hungary. He enjoyed most of his tennis success while playing doubles. During his career he finished runner-up in 3 doubles events.
Machan participated in 21 Davis Cup ties for Hungary from 1969 to 1985, posting a 9–6 record in doubles and a 5–10 record in singles.
| Outcome | No. | Date | Tournament | Surface | Partner | Opponents in the final | Score in the final |
|---|---|---|---|---|---|---|---|
| Runner-up | 1. | 1973 | Prague, Czechoslovakia | Clay | Balázs Taróczy | Jan Kodeš Vladimír Zedník |
3–6, 6–7 |
| Runner-up | 2. | 1974 | Florence, Italy | Clay | Balázs Taróczy | Paolo Bertolucci Adriano Panatta |
3–6, 6–3, 4–6 |
| Runner-up | 3. | 1975 | Shreveport, U.S. | János Benyik | William Brown Juan Gisbert Sr. |
4–6, 4–6 |