Karl Meiler Singles titles (4) Singles titles (4)

| Outcome | Date_ | Championship | Opponent_in_the_final | Score_in_the_final |
|---|---|---|---|---|
| Runner-up | 1974 | Washington D.C., U.S. | Vijay Amritraj | 4–6, 3–6 |
| Runner-up | 1974 | Oslo , Norway | Jeff Borowiak | 3–6, 2–6 |
| Runner-up | 1975 | Nassau , Bahamas | Jimmy Connors | 0–6, 2–6 |
| Runner-up | 1975 | Munich , West Germany | Guillermo Vilas | 6–2, 0–6, 2–6, 3–6 |
| Runner-up | 1975 | Gstaad , Switzerland | Ken Rosewall | 4–6, 4–6, 3–6 |
| Runner-up | 1976 | Munich , West Germany | Manuel Orantes | 1–6, 4–6, 1–6 |
| Runner-up | 1977 | Brussels , Belgium | Harold Solomon | 5–7, 6–3, 6–2, 3–6, 4–6 |
| Winner | 1977 | Manila , Philippines | Manuel Orantes | DEF |
| Runner-up | 1979 | Florence , Italy | Raúl Ramírez | 4–6, 6–1, 6–3, 5–7, 0–6 |