| Guillermo Vilas (1) - C Kirmayr | 6-2 6-3 |
| T Giammalva - L Bottazzi | 6-0 6-1 |
| Manuel Orantes - Slobodan Zivojinovic | 6-3 7-6 |
| Josè Higueras (13) - W Martin | 6-3 7-6 |
| Paul McNamee (15) - John Alexander | 6-4 6-4 |
| A Gimenez - Hunter | 6-1 6-0 |
| R Fagel - M Edmondson | 6-1 6-1 |
| Balasz Taroczy (7) - Francesco Cancellotti | 6-2 6-2 |
| Vitas Gerulaitis (4) - Paolo Bertolucci | 6-3 6-4 |
| B Prajoux - Pablo Arraya | 7-5 6-0 |
| Thierry Tulasne - Hans Gildemeister | 6-1 6-3 |
| Victor Pecci (12) - Jaime Fillol | 6-7 6-2 6-3 |
| Peter McNamara (10) - Eduardo Bengoechea | 6-4 6-0 |
| J Lopez Maeso - Ramesh Krishnan | 6-3 6-4 |
| Corrado Barazzutti - Roberto Arguello | 6-4 6-2 |
| Brian Gottfried (5) - Raul Ramirez | 4-6 6-2 6-2 |
| Adriano Panatta (8) - G Urpi | 6-2 6-1 |
| Tom Gullikson - Ilie Nastase | 7-6 6-4 |
| Zeljko Franulovic - Tom Gullikson | 6-3 6-1 |
| Marco Ostoja - Tomas Smid (11) | 3-6 6-3 6-1 |
| Mel Purcell (14) - A Pierola | 6-4 6-0 |
| Jose Luis Damiani - T Waltke | 6-2 6-3 |
| J Fitzgerald - Ricardo Ycaza | 6-3 3-6 7-6 |
| José Luis Clerc (3) - T Moor | 7-5 6-1 |
| Ricardo Cano - Wojtek Fibak (6) | 3-6 7-5 6-2 |
| G Guerrero - Tonino Zugarelli | 3-6 6-2 6-2 |
| Buster Mottram - Andres Gomez | 6-4 1-6 6-3 |
| Eddie Dibbs (9) - P Portes | 6-1 6-3 |
| M Martinez - Sammy Giammalva (16) | 4-6 6-2 6-4 |
| Bob Manson - Marcos Hocevar | 2-6 7-6 7-6 |
| F Taygan - R Meyer | 6-2 7-5 |
| Ivan Lendl (2) - Gianni Ocleppo | 6-2 6-1 |
| Guillermo Vilas (1) - T Giammalva | 6-1 6-2 |
| Josè Higueras (13) - Manuel Orantes | 6-1 6-2 |
| A Gimenez - Paul McNamee (15) | 6-4 6-3 |
| Balasz Taroczy (7) - R Fagel | 6-2 6-2 |
| Vitas Gerulaitis (4) - B Prajoux | 4-3rt |
| Victor Pecci (12) - Thierry Tulasne | 3-6 6-2 6-3 |
| Peter McNamara (10) - J Lopez Maeso | 6-1 6-4 |
| Corrado Barazzutti - Brian Gottfried (5) | 0-6 6-3 6-3 |
| Adriano Panatta (8) - Tom Gullikson | 6-0 6-2 |
| Marco Ostoja - Zeljko Franulovic | 7-6 6-4 |
| Jose Luis Damiani - Mel Purcell (14) | 6-3 6-0 |
| José Luis Clerc (3) - J Fitzgerald | 6-2 6-3 |
| Ricardo Cano - G Guerrero | 6-4 6-4 |
| Eddie Dibbs (9) - Buster Mottram | 4-6 6-4 6-0 |
| Bob Manson - M Martinez | 6-4 7-6 |
| Ivan Lendl (2) - F Taygan | 6-1 6-1 |