# 1991 ATP German Open – Doubles

The 1991 German Open was a tennis tournament played on outdoor clay courts and was part of the ATP Championship Series of the 1991 ATP Tour. It took place at the Rothenbaum Tennis Center in Hamburg, Germany, from 6 May until 13 May 1991. Sergio Casal and Emilio Sánchez won in the final against Cássio Motta and Danie Visser, 7–6, 7–6.

## Seeds

* Sergio Casal / Emilio Sánchez (champions)
* Udo Riglewski / Michael Stich (Quarterfinal)
* Patrick Galbraith / Todd Witsken (Quarterfinal)
* Broderick Dyke / Laurie Warder (second round)
* Sergi Bruguera / Jim Courier (semifinal)
* Mark Koevermans / Michiel Schapers (first round)
* Omar Camporese / Mark Woodforde (first round)
* Cássio Motta / Danie Visser (final)

## Draw
### Key

* Q = Qualifier
* WC = Wild card
* LL = Lucky loser
* Alt = Alternate
* SE = Special exempt
* PR = Protected ranking
* ITF = ITF entry
* JE = Junior exempt
* w/o = Walkover
* r = Retired
* d = Defaulted
* SR = Special ranking

### Finals

| Semifinal | Semifinal | Semifinal | Semifinal | Final | Final | Final | Final | Final |
| 1 | Sergio Casal Emilio Sánchez | 6 | 6 | | | | | |
| 5 | Sergi Bruguera Jim Courier | 3 | 3 | | | | | |
| 5 | Sergi Bruguera Jim Courier | 3 | 3 | 1 | Sergio Casal Emilio Sánchez | 4 | 6 | 6 |
| | | | | 8 | Cássio Motta Danie Visser | 6 | 3 | 2 |
| | Gustavo Luza Javier Sánchez | 4 | 4 | 8 | Cássio Motta Danie Visser | 6 | 3 | 2 |
| 8 | Cássio Motta Danie Visser | 6 | 6 | | | | | |

### Top half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Quarterfinal | Quarterfinal | Quarterfinal | Quarterfinal | Quarterfinal | Semifinal | Semifinal | Semifinal | Semifinal |
| | | | | | 1 | S Casal E Sánchez | 3 | 7 | 6 | | | | | | | | | |
| | T Carbonell W Ferreira | 7 | 4 | 3 | | G Ivanišević G Prpić | 6 | 5 | 4 | | | | | | | | | |
| | G Ivanišević G Prpić | 5 | 6 | 6 | | | | | | 1 | S Casal E Sánchez | 7 | 6 | | | | | |
| | K Nováček L Pimek | 7 | 3 | 3 | | | | | | | P McEnroe P Sampras | 6 | 0 | | | | | |
| | P McEnroe P Sampras | 5 | 6 | 6 | | P McEnroe P Sampras | 3 | 7 | 7 | | | | | | | | | |
| | JC Báguena V Flégl | 1 | 6 | 6 | | JC Báguena V Flégl | 6 | 6 | 5 | | | | | | | | | |
| 7 | O Camporese M Woodforde | 6 | 3 | 4 | | | | | | | | | | | 1 | S Casal E Sánchez | 6 | 6 |
| | | | | | | | | | | | | | | | 5 | S Bruguera J Courier | 3 | 3 |
| | | | | | 3 | P Galbraith T Witsken | 6 | 6 | 6 | | | | | | | | | |
| | J Brown S Cannon | 1 | 6 | | | R Båthman R Bergh | 3 | 7 | 4 | | | | | | | | | |
| | R Båthman R Bergh | 6 | 7 | | | | | | | 3 | P Galbraith T Witsken | 6 | 6 | 3 | | | | |
| WC | M Bahrami H Leconte | 3 | 3 | | | | | | | 5 | S Bruguera J Courier | 7 | 1 | 6 | | | | |
| WC | E Jelen C-U Steeb | 6 | 6 | | WC | E Jelen C-U Steeb | 6 | 1 | | | | | | | | | | |
| | C Beckman N Brown | 3 | 2 | | 5 | S Bruguera J Courier | 7 | 6 | | | | | | | | | | |
| 5 | S Bruguera J Courier | 6 | 6 | | | | | | | | | | | | | | | |

### Bottom half

| First round | First round | First round | First round | Second round | Second round | Second round | Second round | Quarterfinal | Quarterfinal | Quarterfinal | Quarterfinal | Quarterfinal | Semifinal | Semifinal | Semifinal | Semifinal |
| 6 | M Koevermans M Schapers | 4 | 5 | | | | | | | | | | | | | |
| | S Edberg I Lendl | 6 | 6 | | S Edberg I Lendl | | | | | | | | | | | |
| | T Nijssen C Suk | 6 | 6 | | T Nijssen C Suk | w/o | | | | | | | | | | |
| | R Smith T Svantesson | 4 | 2 | | | | | | T Nijssen C Suk | 6 | 6 | | | | | |
| WC | P Kühnen A Mronz | 2 | 2 | | | | | | G Luza J Sánchez | 7 | 7 | | | | | |
| | G Luza J Sánchez | 6 | 6 | | G Luza J Sánchez | 6 | 7 | | | | | | | | | |
| | | | | 4 | B Dyke L Warder | 4 | 5 | | | | | | | | | |
| | | | | | | | | | | | | | | G Luza J Sánchez | 4 | 4 |
| 8 | C Motta D Visser | 6 | 6 | | | | | | | | | | 8 | C Motta D Visser | 6 | 6 |
| Q | D Engel A Mora | 1 | 1 | 8 | C Motta D Visser | 7 | 6 | | | | | | | | | |
| | S DeVries D Macpherson | 6 | 6 | | S DeVries D Macpherson | 6 | 2 | | | | | | | | | |
| | L Lavalle J Lozano | 3 | 2 | | | | | 8 | C Motta D Visser | 4 | 6 | 6 | | | | |
| | H de la Peña L Mattar | 4 | 4 | | | | | 2 | U Riglewski M Stich | 6 | 4 | 1 | | | | |
| Q | G Bloom A Boetsch | 6 | 6 | Q | G Bloom A Boetsch | 2 | 6 | | | | | | | | | |
| | | | | 2 | U Riglewski M Stich | 6 | 7 | | | | | | | | | |