Singles
| Year | Champions | Runners-up | Score |
|---|---|---|---|
| 1976 | Jimmy Connors | Frew McMillan | 6–2, 6–3 |
| 1977 | Björn Borg | Wojtek Fibak | 2–6, 7–5, 6–3 |
| 1978 | Wojtek Fibak | Vijay Amritraj | 6–2, 0–1, RET. |
| 1979 | Gene Mayer | Wojtek Fibak | 6–3, 3–6, 6–1 |
| 1980 | Robert Lutz | Nick Saviano | 6–4, 6–0 |
| 1981 | Ivan Lendl | Sandy Mayer | 6–3, 6–3 |
| 1982 | Kevin Curren | Shlomo Glickstein | 2–6, 6–2, 6–3 |
| 1983 | Matt Doyle | Hans-Dieter Beutel | 1–6, 6–1, 6–2 |
| 1984 | Joakim Nyström | Miloslav Mečíř | 7–6, 6–2 |
| 1985 | Peter Lundgren | Ramesh Krishnan | 6–3, 6–2 |
| 1986 | Jonas Svensson | Stefan Eriksson | 6–7, 6–2, 6–2 |
Read more about this topic: Cologne Grand Prix