| Thomaz Koch | |
| Residence: | Porto Alegre, Brazil |
| Birth Date: | 1945 5, df=y |
| Birth Place: | Porto Alegre, Brazil |
| Turnedpro: | 1968 (amateur from 1961) |
| Retired: | 1985 |
| Plays: | Left-handed (one-handed backhand) |
| Singlesrecord: | [1] |
| Singlestitles: | 36 |
| Highestsinglesranking: | No. 12 (1967) |
| Frenchopenresult: | QF (1968) |
| Wimbledonresult: | QF (1967) |
| Usopenresult: | QF (1963) |
| Doublesrecord: | 111–99 (Open era) |
| Doublestitles: | 3 (Open era) |
| Wimbledondoublesresult: | SF (1971) |
| Mixed: | yes |
| Frenchopenmixedresult: | W (1975) |
| Wimbledonmixedresult: | QF (1971) |
| Medaltemplates-Expand: | yes |
Thomaz Koch (born 11 May 1945) is a former tennis player from Brazil, who was a quarterfinalist at the French Open, Wimbledon and the U.S. National Championships. Koch was active from 1961 to 1985 and played close to 900 singles matches,[1] and won 36 career singles titles.[1] He was ranked World No 12 player for 1967.[2] His highest computer ranking which was past his peak period in the ATP singles ranking was No. 24 (achieved on December 20, 1974).[1] In addition he also won 5 challenger satellite tour tiles towards the end of his career.[1] He won also two gold medals in the men's tennis competition at the 1967 Pan American Games.[1]
He played his first tournament in 1961 at the Santos Open where he reached the final.[1] He won his first senior title in 1964 at the Swiss International Championships against compatriot Ronald Barnes. He won his final main tour title in 1976 at the Malta International against Britain's Roger Taylor.[1] He played his final singles tournament in 1984 at the Guarujá Open in 1984.[1] He also won the Wimbledon Plate twice, in 1969 and 1975.
(incomplete list)
| Result | W–L | Date | Tournament | Surface | Opponent | Score | |
|---|---|---|---|---|---|---|---|
| Win | 1–0 | 1969 | Caracas, Venezuela | Hard |  Mark Cox | 8–6, 6–3, 2–6, 6–4 | |
| Win | 2–0 | 1969 | Washington, U.S. | Clay |  Arthur Ashe | 7–5, 9–7, 4–6, 2–6, 6–4 | |
| Win | 3–0 | 1971 | Caracas, Venezuela | Hard |  Manuel Orantes | 7–6, 6–1, 6–3 | |
| Loss | 3–1 | 1976 | Khartoum, Sudan | Hard | Mike Estep | 4–6, 7–6, 4–6, 3–6 | |
| Loss | 3–2 | 1976 | Nuremberg, Germany | Carpet (i) | Frew McMillan | 6–2, 3–6, 4–6 |
| Result | W–L | Date | Tournament | Surface | Partner | Opponents | Score | |
|---|---|---|---|---|---|---|---|---|
| Loss | 0–1 | 1968 | Barcelona, Spain | Clay |  José Mandarino | Carlos Fernandes Patricio Rodríguez | 2–6, 6–3, 6–3, 1–6, 4–6 | |
| Loss | 0–2 | 1969 | London/Queen's, U.K. | Grass |  Ove Nils Bengtson |  Owen Davidson Dennis Ralston | 6–8, 3–6 | |
| Loss | 0–3 | 1971 | Salisbury, U.S. | Hard (i) | Clark Graebner | Juan Gisbert, Sr. Manuel Orantes | 3–6, 6–4, 6–7 | |
| Win | 1–3 | 1971 | Macon, U.S. | Hard | Clark Graebner | Željko Franulović Jan Kodeš | 6–3, 7–6 | |
| Loss | 1–4 | 1971 | Hampton, U.S. | Hard (i) | Clark Graebner | Ilie Năstase Ion Țiriac | 4–6, 6–4, 5–7 | |
| Win | 2–4 | 1971 | Caracas, Venezuela | Clay | José Edison Mandarino | Gerald Battrick Peter Curtis | 6–4, 3–6, 6–7, 6–4, 7–6 | |
| Loss | 2–5 | 1972 | Washington D.C., U.S. | Carpet (i) | Clark Graebner | Tom Edlefsen Cliff Richey | 4–6, 3–6 | |
| Loss | 2–6 | 1974 | Gstaad, Switzerland | Clay | Roy Emerson | José Higueras Manuel Orantes | 5–7, 6–0, 1–6, 8–9 | |
| Win | 3–6 | 1975 | Istanbul, Turkey | Clay | Colin Dibley | Colin Dowdeswell John Feaver | 6–2, 6–2, 6–2 | |
| Loss | 3–7 | 1982 | Itaparica, Brazil | Carpet | José Schmidt | Givaldo Barbosa João Soares | 6–7, 1–2 ret. | |
| Loss | 3–8 | 1983 | Bahia, Brazil | Hard |  Ricardo Cano | Givaldo Barbosa João Soares |