Thomas Muster Singles: 55 (44–11) Singles: 55 (44–11)

| Outcome | Date_ | Championship | Surface | Opponent | Score |
|---|---|---|---|---|---|
| Winner | 12 March 1990 | Casablanca | Clay | Guillermo Pérez-Roldán | 6–1, 6–7 (6–8) , 6–2 |
| Runner-up | 30 April 1990 | Monte Carlo | Clay | Andrei Chesnokov | 5–7, 3–6, 3–6 |
| Runner-up | 7 May 1990 | Munich | Clay | Karel Nováček | 4–6, 2–6 |
| Winner | 21 May 1990 | Rome | Clay | Andrei Chesnokov | 6–1, 6–3, 6–1 |
| Winner | 17 June 1991 | Florence | Clay | Horst Skoff | 6–2, 6–7 (2–7) , 6–2 |
| Winner | 16 September 1991 | Geneva | Clay | Horst Skoff | 6–2, 6–4 |
| Winner | 27 April 1992 | Monte Carlo | Clay | Aaron Krickstein | 6–3, 6–1, 6–3 |
| Winner | 15 June 1992 | Florence | Clay | Renzo Furlan | 6–3, 1–6, 6–1 |
| Winner | 31 August 1992 | Umag | Clay | Franco Davín | 6–1, 4–6, 6–4 |