| Singles | |
|---|---|
| 1991 ATP German Open | |
| 1990 Champion |
|
| Champion |
|
| Runner-up |
|
| Final score | 6–3, 6–3, 5–7, 0–6, 6–1 |
The 1991 German Open was a tennis tournament played on outdoor clay courts and was part of the ATP Super 9 of the 1991 ATP Tour. It took place at the Rothenbaum Tennis Center in Hamburg, Germany, from May 6 through May 13, 1991.Karel Nováček won in the final against Magnus Gustafsson, 6–3, 6–3, 5–7, 0–6, 6–1.