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

| Outcome | Date_ | Championship | Opponent_in_the_final | Score_in_the_final |
|---|---|---|---|---|
| Winner | 1972 | Buenos Aires , Argentina | Guillermo Vilas | 6–7, 2–6, 6–4, 6–4, 6–4 |
| Runner-up | 1973 | Salisbury , U.S. | Jimmy Connors | 6–7, 6–7, 3–6 |
| Runner-up | 1973 | West Berlin | Hans-Jürgen Pohmann | 3–6, 6–3, 3–6, 3–6 |
| Runner-up | 1973 | Hamburg , West Germany | Eddie Dibbs | 1–6, 6–3, 6–7, 3–6 |
| Runner-up | 1974 | Roanoke , U.S. | Jimmy Connors | 4–6, 3–6 |
| Winner | 1974 | Omaha , U.S. | Jimmy Connors | 6–3, 1–6, 6–1 |
| Runner-up | 1974 | Little Rock , U.S. | Jimmy Connors | 2–6, 1–6 |
| Winner | 1974 | Calgary , Canada | Byron Bertram | 6–4, 3–6, 6–3 |
| Runner-up | 1974 | Jackson , U.S. | Sandy Mayer | 6–7, 5–7 |