| Guillermo Vilas (1) - F Merlone | 6-2 6-3 |
| Guillermo Aubone - M Meneschincheri (13) | 6-3 2-6 7-6 |
| Hank Pfister - P Parrini | 4-6 6-1 6-3 |
| Florian Segarceanu - Gianni Ocleppo (16) | 6-4 6-3 |
| Raul Ramirez (13) - F Buehning | 7-5 6-4 |
| Butch Walts - C Motta | 6-2 6-4 |
| Paul McNamee - Paolo Bertolucci | 6-4 7-5 |
| José Luis Clerc (8) - R Case | 6-1 6-2 |
| Gene Mayer (3) - T Waltke | 7-5 6-2 |
| Peter McNamara - Van Winitsky | 7-6 6-4 |
| Bob Manson - Tim Mayotte | 6-7 6-2 6-1 |
| Eliot Teltscher (10) - Buster Mottram | 6-4 1-6 6-1 |
| Brian Gottfried (12) - P Proisy | 5-7 7-6 6-4 |
| Adriano Panatta - Shlomo Glickstein | 6-3 7-6 |
| Dominique Bedel - B Mitton | 6-1 6-1 |
| Ivan Lendl (6) - Kim Warwick | 6-1 6-2 |
| Hans Gildemeister (7) - Eduardo Bengoechea | 6-3 6-1 |
| Pavel Hutka - Phil Dent | 4-6 6-2 6-4 |
| Roberto Vizcaino - W Martin | 6-3 7-5 |
| Corrado Barazzutti (14) - J Caujolle | 4-6 6-4 6-0 |
| Yannick Noah (11) - Jose Luis Damiani | 6-2 6-7 6-3 |
| Jiri Hrebec - A Jarrett | 7-6 6-1 |
| F Luna - Tonino Zugarelli | 6-2 6-4 |
| Eddie Dibbs (4) - J Delaney | 6-3 6-0 |
| Balasz Taroczy - Josè Higueras (5) | 7-6 6-3 |
| Andres Gomez - B Drewett | 6-3 6-3 |
| John Alexander - G Rinaldini | 6-2 6-1 |
| Manuel Orantes (9) - Ivan Molina | 6-2 6-2 |
| Tomas Smid (15) - P Portes | 7-5 6-4 |
| Geoff Masters - A Kohlberg | 7-5 6-2 |
| Thierry Tulasne - S Mayer | 6-2 6-3 |
| Vitas Gerulaitis (2) - M Edmondson | 6-3 6-0 |
| Guillermo Vilas (1) - Guillermo Aubone | 6-1 6-2 |
| Hank Pfister - Florian Segarceanu | 6-4 6-2 |
| Raul Ramirez (13) - Butch Walts | 6-4 6-0 |
| José Luis Clerc (8) - Paul McNamee | 6-3 3-6 6-3 |
| Paul McNamee - Gene Mayer (3) | 1-1 r-t |
| Eliot Teltscher (10) - Bob Manson | 6-1 6-1 |
| Brian Gottfried (12) - Adriano Panatta | 6-2 6-3 |
| Ivan Lendl (6) - Dominique Bedel | 4-6 6-4 6-2 |
| Hans Gildemeister (7) - Pavel Hutka | 2-6 6-2 7-6 |
| Corrado Barazzutti (14) - Roberto Vizcaino | 6-3 6-0 |
| Yannick Noah (11) - Jiri Hrebec | 6-3 3-6 6-0 |
| Eddie Dibbs (4) - F Luna | 4-6 6-0 6-0 |
| Andres Gomez - Balasz Taroczy | 6-4 6-2 |
| Manuel Orantes (9) - John Alexander | 7-5 6-7 6-3 |
| Tomas Smid (15) - Geoff Masters | 6-1 6-3 |
| Thierry Tulasne - Vitas Gerulaitis (2) | 6-3 6-3 |