| Eugenio Castigliano - K Johansson | 6-3 3-6 6-0 |
| Ezio Di Matteo - J Pinto Bravo | 6-4 6-1 |
| Gerald Battrick - M Lara | 6-2 6-2 |
| Tonino Zugarelli - Terry Addison | 6-4 6-2 |
| N Kalogeropoulos - I Fletcher | 6-4 6-1 |
| R Case - Jairo Velasco | 6-0 6-0 |
| P Cornejo - Corrado Barazzutti | 6-1 6-4 |
| Ivan Molina - L Borea | 6-2 6-0 |
| Jean Baptiste Chanfreau - Vladimir Zednik | w.o. |
| Charlie Pasarell - F Froehling | 7-5 6-1 |
| Jiri Hrebec - Jeff Borowiak | 6-4 6-4 7-5 |
| T Tarpishev - J Kamiwazumi | 7-6 6-4 |
| A Pattison - J McManus | 4-6 6-4 6-4 |
| Patrice Dominguez - P Marzano | 6-1 7-5 |
| Piero Toci - P Gerken | 4-6 6-4 6-2 |
| Paolo Bertolucci - J Kuki | 0-6 6-3 6-2 |
| R Machan - R Maud | w. o. |
| Martin Mulligan - S Baranyi | 6-4 6-2 |
| J Rouyer - Graham Stilwell | 6-2 7-6 |
| Peter Szoke - Nicola Pietrangeli | 6-2 4-6 6-4 |
| Boro Jovanovic - W N'Godrella | 6-0 5-7 7-5 |
| Geoff Masters - Guillermo Vilas | 1-6 7-6 6-2 |
| Giuseppe Merlo - J Paish | 2-6 6-1 6-4 |
| Eric Van Dillen - I Gulyas | 6-7 6-1 6-1 |
| V Korotkov - T Sakai | 6-2 6-2 |
| R Russell - Bjorn Borg | w. o. |
| H Rahim - Bob Carmichael | 7-5 6-1 |
| F Pala - Massimo Cierro | 6-2 5-7 6-3 |
| Vittorio Crotta - G Goven | 7-5 1-6 6-3 |
| A Munoz - Allan Stone | 7-5 4-6 6-2 |
| V Franchitti - B Phillips Moore | 6-1 6-3 |
| Phil Dent - A Shimamura | 6-0 6-1 |
| Ilie Nastase (2) - Eugenio Castigliano | 6-0 6-2 |
| Ezio Di Matteo - Brian Gottfried | 6-2 6-2 |
| Gerald Battrick - John Alexander (15) | 2-6 7-5 6-3 |
| Tonino Zugarelli - Tom Gorman | 7-5 6-7 6-1 |
| Jan Kodes (7) - N Kalogeropoulos | 6-2 6-2 |
| R Case - Juan Gisbert | 6-3 6-4 |
| P Cornejo - M Di Domenico | 6-3 6-3 |
| Onny Parun - Ivan Molina | 7-5 6-1 |
| Arthur Ashe (3) - Jean Baptiste Chanfreau | 6-4 6-4 |
| Charlie Pasarell - B Fairlie | 6-4 6-4 |
| Jiri Hrebec - Jimmy Connors (14) | 2-6 6-2 6-4 |
| T Tarpishev - Jaime Fillol | 7-6 6-3 |
| Adriano Panatta (6) - A Pattison | 6-3 6-4 |
| Patrice Dominguez - Nikki Pilic | 3-6 6-3 6-4 |
| Roger Taylor (11) - Piero Toci | 6-3 6-2 |
| Paolo Bertolucci - Ion Tiriac | 4-6 6-3 6-3 |
| Alex Metreveli - R Machan | 6-2 7-5 |
| Martin Mulligan - Bob Lutz (12) | 6-3 6-2 |
| Colin Dibley - J Rouyer | 6-2 7-6 |
| Peter Szoke - John Newcombe (5) | 7-6 7-6 |
| Boro Jovanovic - Dick Stockton | 7-5 6-3 |
| Cliff Drysdale (13) - Geoff Masters | 6-3 6-3 |
| Pierre Barthes - Giuseppe Merlo | 6-2 6-0 |
| Manuel Orantes (4) - Eric Van Dillen | 6-1 6-4 |
| V Korotkov - R Moore | 3-6 7-5 6-3 |
| Cliff Richey (9) - R Russell | 6-1 6-0 |
| H Rahim - P Rodriguez | 7-5 7-5 |
| Tom Okker (8) - F Pala | 6-4 7-6 |
| Harold Solomon - Vittorio Crotta | 6-3 6-1 |
| Mark Cox (16) - A Munoz | 6-7 6-2 6-1 |
| Francois Jauffret - V Franchitti | 6-2 6-1 |
| Stan Smith (1) - Phil Dent | 4-6 6-3 6-4 |
| Ilie Nastase (2) - Ezio Di Matteo | 6-0 6-4 |
| Tonino Zugarelli - Gerald Battrick | 6-3 5-7 6-3 |
| Jan Kodes (7) - R Case | 6-1 6-2 |
| P Cornejo - Onny Parun | 6-3 6-7 6-1 |
| Charlie Pasarell - Arthur Ashe (3) | 6-2 6-2 |
| Jiri Hrebec - T Tarpishev | 6-2 6-3 |
| Patrice Dominguez - Adriano Panatta (6) | 6-4 7-6 |
| Paolo Bertolucci - Roger Taylor (11) | 4-6 6-3 7-5 |
| Martin Mulligan - Alex Metreveli | 6-3 1-6 6-3 |
| Peter Szoke - Colin Dibley | 4-6 6-3 6-3 |
| Boro Jovanovic - Cliff Drysdale (13) | 7-5 4-6 6-2 |
| Manuel Orantes (4) - Pierre Barthes | 6-2 7-5 |
| V Korotkov - Cliff Richey (9) | 6-3 6-3 |
| Tom Okker (8) - H Rahim | 4-6 6-2 6-0 |
| Harold Solomon - Mark Cox (16) | 6-1 6-4 |
| Stan Smith - Francois Jauffret | 6-2 7-6 |