Markus Günthardt (born 10 September 1957) is a Swiss former tennis player. Günthardt won three doubles titles during his professional career. The right-hander reached his highest ATP doubles ranking on 17 September 1984, when he became the number 44 in the world.
| Country (sports) |  Switzerland |
|---|---|
| Born | 10 September 1957 Zurich, Switzerland |
| Height | 5 ft 10 in (178 cm) |
| Plays | Right-handed |
| Prize money | $81,388 |
| Singles | |
| Career record | 1–15 |
| Highest ranking | No. 209 (4 January 1981) |
| Grand Slam singles results | |
| US Open | 1R (1981) |
| Doubles | |
| Career record | 70–77 |
| Career titles | 3 |
| Highest ranking | No. 44 (17 September 1984) |
| Grand Slam doubles results | |
| Australian Open | 2R (1981) |
| French Open | QF (1981) |
| Wimbledon | 3R (1982) |
| US Open | 1R (1981) |
Günthardt participated in 14 Davis Cup ties for Switzerland from 1980–86, posting a 9-5 record in doubles.
Günthardt's younger brother Heinz was a successful doubles player, winning two Grand Slam doubles titles in his career.
Doubles titles (3)
| Outcome | No. | Date | Tournament | Surface | Partner | Opponents in the final | Score in the final |
|---|---|---|---|---|---|---|---|
| Winner | 1. | 1980 | Båstad, Sweden | Clay | Heinz Günthardt |  John Feaver  Peter McNamara | 6–4, 6–4 |
| Runner-up | 1. | 1980 | Geneva, Switzerland | Clay | Heinz Günthardt |  Željko Franulović  Balázs Taróczy | 4–6, 6–4, 4–6 |
| Winner | 2. | 1981 | Gstaad, Switzerland | Clay | Heinz Günthardt | David Carter Paul Kronk | 6–4, 6–1 |
| Runner-up | 2. | 1981 | Basel, Switzerland | Hard (i) |  Pavel Složil |  José Luis Clerc  Ilie Năstase | 6–7, 7–6, 6–7 |
| Runner-up | 3. | 1982 | Cairo, Egypt | Clay | Heinz Günthardt |  Drew Gitlin Jim Gurfein | 4–6, 5–7 |
| Runner-up | 4. | 1982 | Gstaad, Switzerland | Clay | Heinz Günthardt | Sandy Mayer Ferdi Taygan | 2–6, 3–6 |
| Runner-up | 5. | 1983 | Madrid, Spain | Clay | Zoltán Kuhárszky | Heinz Günthardt Pavel Složil | 3–6, 3–6 |
| Winner | 3. | 1984 | Gstaad, Switzerland | Clay | Heinz Günthardt |  Givaldo Barbosa João Soares | 6–4, 3–6, 7–6 |
