| Doubles | |
|---|---|
| 1993 ATP Buenos Aires | |
| Champions |  Tomás Carbonell Carlos Costa |
| Runners-up | Sergio Casal Emilio Sánchez |
| Final score | 6–4, 6–4 |
Pablo Albano and Javier Frana were the defending champions, but lost in the quarterfinals this year.
Tomás Carbonell and Carlos Costa won the title, defeating Sergio Casal and Emilio Sánchez 6–4, 6–4 in the final. [1]
Sergio Casal / Emilio Sánchez (final)
Marcos Ondruska / Byron Talbot (first round)
Mike Bauer / 
David Rikl (first round)| First round | Quarterfinals | Semifinals | Final | ||||||||||||||||||||||||
| 1 | S Casal E Sánchez | 7 | 6 | ||||||||||||||||||||||||
| B Devening J Waite | 6 | 2 | 1 | S Casal E Sánchez | 2 | 7 | 6 | ||||||||||||||||||||
 H de la Peña  J Lozano | 6 | 6 | 7 | H de la Peña J Lozano | 6 | 6 | 4 | ||||||||||||||||||||
| WC |  D Pérez  M Wilander | 7 | 3 | 6 | 1 | S Casal E Sánchez | 6 | 5 | 6 | ||||||||||||||||||
| 4 | M Bauer D Rikl | 4 | 3 | Q | P Arnold D Orsanic | 0 | 7 | 2 | |||||||||||||||||||
| Q | P Arnold D Orsanic | 6 | 6 | Q | P Arnold D Orsanic | 6 | 7 | ||||||||||||||||||||
| P Albano J Frana | 7 | 6 | P Albano J Frana | 2 | 5 | ||||||||||||||||||||||
| D Johnson J Sullivan | 6 | 4 | 1 | S Casal E Sánchez | 4 | 4 | |||||||||||||||||||||
| B Haygarth G Van Emburgh | 6 | 6 | T Carbonell C Costa | 6 | 6 | ||||||||||||||||||||||
| T Carbonell C Costa | 7 | 7 | T Carbonell C Costa | 6 | 6 | 6 | |||||||||||||||||||||
 C Brandi F Roig | 6 | 6 | C Brandi F Roig | 4 | 7 | 2 | |||||||||||||||||||||
| LL | L Arnold G Etlis | 0 | 4 | T Carbonell C Costa | 6 | 6 | |||||||||||||||||||||
| F Montana J Pugh | 3 | 6 | 7 | F Montana J Pugh | 1 | 4 | |||||||||||||||||||||
| WC | M Jaite C Miniussi | 6 | 3 | 6 | F Montana J Pugh | 3 | 6 | 7 | |||||||||||||||||||
C Allgårdh  M Ruah | 4 | 7 | 7 | C Allgårdh M Ruah | 6 | 3 | 6 | ||||||||||||||||||||
| 2 | M Ondruska B Talbot | 6 | 5 | 6 | |||||||||||||||||||||||
Joakim Nyström and Mats Wilander were the defending champions, but lost in the second round to Carl Limberger and Mark Woodforde.
Raffaella Reggi and Sergio Casal were the defending champions but did not turn up in the semifinals to play Martina Navratilova and Emilio Sánchez.
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. Sergio Casal and Emilio Sánchez won in the final against Cássio Motta and Danie Visser, 7–6, 7–6.
This was the first edition of the event.
Danie Visser and Laurie Warder were the defending champions, but they did not compete together this year. Visser participated alongside Jim Grabb and was defeated in the first round by Sergio Casal and Emilio Sánchez, while Warder participated alongside Brett Steven and was defeated also in the first round by Goran Ivanišević and Marc Rosset.
There was no defending champions for this year, as the previous final between Tomás Carbonell and Diego Pérez against Paul Haarhuis and Mark Koevermans was cancelled due to rain.
Peter Ballauff and Rüdiger Haas were the defending champions, but did not compete this year.
Sergio Casal and Emilio Sánchez were the defending champions, but Emilio Sánchez did not compete this year. Casal teamed up with Javier Sánchez and lost in the semifinals to Pablo Albano and Javier Frana.
Stefan Edberg and Petr Korda were the defending champions, but lost in the first round to Gary Muller and Danie Visser.
Paul Haarhuis and Mark Koevermans were the defending champions, but competed this year with different partners. Haarhuis teamed up with Jacco Eltingh and lost in the semifinals to Henrik Holm and Anders Järryd, while Koevermans teamed up with Jan Apell and lost in the first round to Javier Sánchez and Daniel Vacek.
Jakob Hlasek and Marc Rosset were the defending champions, but lost in the first round to Luke Jensen and Murphy Jensen.
Filip Dewulf and Tom Vanhoudt were the defending champions, but Dewulf did not compete this year. Vanhoudt teamed up with Aleksandar Kitinov and lost in the first round to Emilio Benfele Álvarez and Hernán Gumy.
Juan Garat and Roberto Saad were the defending champions, but Garat did not compete this year. Saad teamed up with Patricio Arnold and lost in the quarterfinals to David Adams and Andrei Olhovskiy.
Sergio Casal and Emilio Sánchez successfully defended their title by defeating Carl-Uwe Steeb and Michael Stich in the final, 5–7, 6–4, 6–3.
Sergio Casal and Emilio Sánchez were the defending champions, but lost to Omar Camporese and Goran Ivanisevic in the quarterfinals. Camporese and Ivanisevic went on to win the title, defeating Luke Jensen and Laurie Warder in the finals, 6–2, 6–3.
Sergio Casal and Emilio Sánchez were the two-time defending champions, but lost to Paul Haarhuis and Mark Koevermans in the semifinals.
Arnaud Boetsch and Guy Forget were the defending champions, but lost in the final to Sergio Casal and Emilio Sánchez. The score was 6–1, 6–4.
Johan Donar and Ola Jonsson were the defending champions, but lost in the first round to Sergio Casal and Emilio Sánchez.
Cédric Pioline and Marc Rosset were the defending champions, but Pioline did not compete this year in order to focus on the singles tournament. Rosset teamed up with Andrei Medvedev and were forced to withdraw before their quarterfinal match.
Sergio Casal and Emilio Sánchez successfully defended their title, by defeating Jorge Lozano and Todd Witsken 7–6(7–4), 7–6(7–4) in the final.