Thomaz Koch
Open era singles finals (3-2)
Columns: Outcome | Date | Championship | Surface | Opponent in the final | Score in the final
Winner | 1969 | Caracas, Venezuela | Clay | Mark Cox | 8–6, 6–3, 2–6, 6–4 | Winner | 1969 | Washington, U.S. | Hard | Arthur Ashe | 7–5, 9–7, 4–6, 2–6, 6–4 | Winner | 1971 | Caracas, Venezuela | Clay | Manuel Orantes | 7–6, 6–1, 6–3 | Runner-up | 1976 | Khartoum, Sudan | Hard | Mike Estep | 4–6, 7–6, 4–6, 3–6 | Runner-up | 1976 | Nuremberg, Germany | Carpet | Frew McMillan | 6–2, 3–6, 4–6