| Mario Martínez | |
| Fullname: | Mario E. Martínez Guzmán |
| Birth Date: | 1961 9, df=y |
| Birth Place: | La Paz, Bolivia |
| Turnedpro: | 1980 |
| Retired: | 1985 |
| Plays: | Right-handed |
| Careerprizemoney: | $2,102 |
| Singlesrecord: | 86–73 |
| Singlestitles: | 3 |
| Highestsinglesranking: | No. 32 (27 October 1980) |
| Frenchopenresult: | 3R (1983) |
| Usopenresult: | 1R (1980, 1981, 1982) |
| Doublesrecord: | 14–36 |
| Doublestitles: | 0 |
| Highestdoublesranking: | No. 274 (3 January 1983) |
| Frenchopendoublesresult: | 1R (1981) |
Mario E. Martínez Guzmán[1] (born 12 September 1961) is a former professional tennis player from Bolivia.
Martínez achieved a career-high singles ranking of world No. 35 in September 1983.
He participated in three Davis Cup ties for Bolivia from 1977–1978 and one more in 1988, posting a 3–5 record in singles and an 0–2 record in doubles.
| Legend (singles) | |
|---|---|
| Grand Slam (0) | |
| Tennis Masters Cup (0) | |
| ATP Masters Series (0) | |
| ATP Tour (3) | |
| Challengers (2) |
| Result | No. | Year | Tournament | Surface | Opponent | Score | |
|---|---|---|---|---|---|---|---|
| Win | 1. | 1980 | Bordeaux | Clay |  Gianni Ocleppo | 6–0, 7–5, 7–5 | |
| Loss | 1. | 1980 | Cuneo | Clay |  Ricardo Cano | 5–7, 2–6 | |
| Loss | 2. | 1981 | Nice | Clay |  Yannick Noah | 4–6, 2–6 | |
| Win | 2. | 1981 | Venice | Clay | Paolo Bertolucci | 6–4, 6–4 | |
| Win | 3. | 1981 | Messina | Clay | Robbie Venter | 6–4, 7–5 | |
| Win | 4. | 1982 | Palermo | Clay |  John Alexander | 6–4, 7–5 | |
| Loss | 3. | 1982 | Messina | Clay |  Pablo Arraya | 5–7, 4–6 | |
| Win | 5. | 1983 | Messina | Clay | Patrice Kuchna | 6–7, 6–0, 9–7 |