1983 ABN World Tennis Tournament – Singles
# 1983 ABN World Tennis Tournament – Singles

First-seeded Guillermo Vilas was the defending champion of the singles event at the ABN World Tennis Tournament, but lost in the final against second-seeded Gene Mayer 6–1, $7–6^{(11–9)}.$

## Seeds

* Guillermo Vilas (final)
* Gene Mayer (champion)
* Peter McNamara (first round)
* Sandy Mayer (first round)
* Mark Edmondson (first round)
* Tim Mayotte (first round)
* Buster Mottram (first round)
* Mel Purcell (first round)

## Draw

### Finals

| Semifinals | Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final |
| - | - | - | - | - | - | - | - | - |
| 1 | Guillermo Vilas | 3 | 6 | 6 | | | | |
| | John Fitzgerald | 6 | 4 | 1 | | | | |
| | John Fitzgerald | 6 | 4 | 1 | 1 | Guillermo Vilas | 1 | 6 |
| | | | | | 2 | Gene Mayer | 6 | 7 |
| | Fritz Buehning | 1 | 4 | | 2 | Gene Mayer | 6 | 7 |
| 2 | Gene Mayer | 6 | 6 | | | | | |

**Upper half**

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals |
| - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| 1 | Guillermo Vilas | 7 | 6 | | | | | | | | | | | | | | |
| | Pavel Složil | 5 | 1 | | | | | | | | | | | | | | |
| | Pavel Složil | 5 | 1 | | 1 | Guillermo Vilas | 6 | 6 | | | | | | | | | |
| | | | | | Q | Jakob Hlasek | 3 | 3 | | | | | | | | | |
| Q | Jakob Hlasek | 7 | 6 | | Q | Jakob Hlasek | 3 | 3 | | | | | | | | | |
| | Andy Andrews | 6 | 1 | | | | | | | | | | | | | | |
| | Andy Andrews | 6 | 1 | | | | | | 1 | Guillermo Vilas | 6 | 6 | | | | | |
| | | | | | | | | | | Tim Wilkison | 3 | 3 | | | | | |
| | Mike De Palmer | 6 | 6 | | | | | | | | | | Tim Wilkison | 3 | 3 | | | | | | |
| Q | Marko Ostoja | 2 | 0 | | | | | | | | | | | | | | |
| Q | Marko Ostoja | 2 | 0 | | | Mike De Palmer | 2 | 4 | | | | | | | | | |
| | | | | | | Tim Wilkison | 6 | 6 | | | | | | | | | |
| | Tim Wilkison | 3 | 6 | 6 | | Tim Wilkison | 6 | 6 | | | | | | | | | |
| 8 | Mel Purcell | 6 | 4 | 2 | | | | | | | | | | | | | |
| 8 | Mel Purcell | 6 | 4 | 2 | | | | | | | | | 1 | Guillermo Vilas | 3 | 6 | 6 |
| | | | | | | | | | | | | | | John Fitzgerald | 6 | 4 | 1 |
| 3 | Peter McNamara | 6 | 6 | r | | | | | | | | | | | | | | John Fitzgerald | 6 | 4 | 1 |
| Q | Jiří Granát | 7 | 6 | | | | | | | | | | | | | | |
| Q | Jiří Granát | 7 | 6 | | Q | Jiří Granát | 4 | 2 | | | | | | | | | |
| | | | | | | John Fitzgerald | 6 | 6 | | | | | | | | | |
| | John Fitzgerald | 3 | 6 | 6 | | John Fitzgerald | 6 | 6 | | | | | | | | | |
| | Brad Gilbert | 6 | 4 | 2 | | | | | | | | | | | | | |
| | Brad Gilbert | 6 | 4 | 2 | | | | | | John Fitzgerald | 7 | 6 | | | | | |
| | | | | | | | | | | Nick Saviano | 6 | 3 | | | | | |
| | Jaime Fillol | 6 | 7 | | | | | | | | | | Nick Saviano | 6 | 3 | | | | | | |
| | Jairo Velasco | 1 | 5 | | | | | | | | | | | | | | |
| | Jairo Velasco | 1 | 5 | | | Jaime Fillol | 5 | 4 | | | | | | | | | |
| | | | | | | Nick Saviano | 7 | 6 | | | | | | | | | |
| | Nick Saviano | 7 | 6 | | | Nick Saviano | 7 | 6 | | | | | | | | | |
| 5 | Mark Edmondson | 6 | 2 | | | | | | | | | | | | | | |

**Lower half**

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | | Semifinals | Semifinals | Semifinals | Semifinals |
| - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| 6 | Tim Mayotte | 2 | 3 | | | | | | | | | | | | | | | | |
| | Fritz Buehning | 6 | 6 | | | | | | | | | | | | | | | | |
| | Fritz Buehning | 6 | 6 | | | Fritz Buehning | 5 | 6 | 6 | | | | | | | | | | |
| | | | | | | Victor Amaya | 7 | 4 | 4 | | | | | | | | | | |
| Q | Erick Iskersky | 5 | 3 | | | Victor Amaya | 7 | 4 | 4 | | | | | | | | | | |
| | Victor Amaya | 7 | 6 | | | | | | | | | | | | | | | | |
| | Victor Amaya | 7 | 6 | | | | | | | | Fritz Buehning | 6 | 3 | 6 | | | | | |
| | | | | | | | | | | | Hank Pfister | 3 | 6 | 0 | | | | | |
| | Vijay Amritraj | 7 | 5 | 1/r | | | | | | | | | | | | Hank Pfister | 3 | 6 | 0 | | | | |
| | Hank Pfister | 6 | 7 | 2 | | | | | | | | | | | | | | | |
| | Hank Pfister | 6 | 7 | 2 | | Hank Pfister | 7 | 6 | | | | | | | | | | | |
| | | | | | | Bernard Boileau | 5 | 0 | | | | | | | | | | | |
| | Bernard Boileau | 7 | 4 | 6 | | Bernard Boileau | 5 | 0 | | | | | | | | | | | |
| 4 | Sandy Mayer | 6 | 6 | 2 | | | | | | | | | | | | | | | |
| 4 | Sandy Mayer | 6 | 6 | 2 | | | | | | | | | | | | | Fritz Buehning | 2 | 1 |
| | | | | | | | | | | | | | | | | 2 | Gene Mayer | 6 | 6 |
| 7 | Buster Mottram | 3 | 6 | 2 | | | | | | | | | | | | | | | | 2 | Gene Mayer | 6 | 6 |
| | Vincent Van Patten | 6 | 1 | 6 | | | | | | | | | | | | | | | |
| | Vincent Van Patten | 6 | 1 | 6 | | Vincent Van Patten | 6 | 6 | | | | | | | | | | | |
| | | | | | | Tom Gullikson | 4 | 4 | | | | | | | | | | | |
| | Pat Dupre | 6 | 5 | 1 | | Tom Gullikson | 4 | 4 | | | | | | | | | | | |
| | Tom Gullikson | 3 | 7 | 6 | | | | | | | | | | | | | | | |
| | Tom Gullikson | 3 | 7 | 6 | | | | | | | Vincent Van Patten | 4 | 2 | | | | | | |
| | | | | | | | | | | 2 | Gene Mayer | 6 | 6 | | | | | | |
| | Russell Simpson | 6 | 6 | | | | | | | | | | | | 2 | Gene Mayer | 6 | 6 | | | | | |
| | Sammy Giammalva | 3 | 0 | | | | | | | | | | | | | | | | |
| | Sammy Giammalva | 3 | 0 | | | Russell Simpson | 0 | 3 | | | | | | | | | | | |
| | | | | | 2 | Gene Mayer | 6 | 6 | | | | | | | | | | | |
| | Michiel Schapers | 6 | 5 | 1 | 2 | Gene Mayer | 6 | 6 | | | | | | | | | | | |
| 2 | Gene Mayer | 0 | 7 | 6 | | | | | | | | | | | | | | | |
