# 1980 ABN World Tennis Tournament – Singles

Björn Borg was the defending champion of the singles event at the ABN World Tennis Tournament, but did not participate in this edition. Unseeded Heinz Günthardt won the title after a victory in the final against first-seeded Gene Mayer 6–2, 6–4.

## Seeds

* Gene Mayer (final)
* John Sadri (quarterfinals)
* Stan Smith (first round)
* Ivan Lendl (semifinals)
* Tim Gullikson (first round)
* Adriano Panatta (second round)
* Vijay Amritraj (quarterfinals)

## Draw
### Finals

| Semifinals | Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final |
| 1 | Gene Mayer | 6 | 6 | 6 | | | | |
| | Paul McNamee | 7 | 3 | 1 | | | | |
| | Paul McNamee | 7 | 3 | 1 | 1 | Gene Mayer | 2 | 4 |
| | | | | | | Heinz Günthardt | 6 | 6 |
| 4 | Ivan Lendl | 6 | 6 | 3 | | Heinz Günthardt | 6 | 6 |
| | Heinz Günthardt | 4 | 7 | 6 | | | | |

### Upper 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 | | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 1 | Gene Mayer | 6 | 6 | | | | | | | | | | | | | | | | |
| | Peter McNamara | 0 | 1 | | | | | | | | | | | | | | | | |
| | Peter McNamara | 0 | 1 | | 1 | Gene Mayer | 6 | 6 | | | | | | | | | | | |
| | | | | | | Brian Teacher | 2 | 4 | | | | | | | | | | | |
| | Jean-François Caujolle | 2 | 4 | | | Brian Teacher | 2 | 4 | | | | | | | | | | | |
| | Brian Teacher | 6 | 6 | | | | | | | | | | | | | | | | |
| | Brian Teacher | 6 | 6 | | | | | | | 1 | Gene Mayer | 6 | 6 | | | | | | |
| | | | | | | | | | | | Chris Delaney | 4 | 4 | | | | | | |
| WC | Marc Albert | 6 | 4 | 5 | | | | | | | | | | | Chris Delaney | 4 | 4 | | | | | | |
| | Chris Delaney | 4 | 6 | 7 | | | | | | | | | | | | | | | |
| | Chris Delaney | 4 | 6 | 7 | | Chris Delaney | 1 | 6 | 7 | | | | | | | | | | |
| | | | | | 6 | Adriano Panatta | 6 | 3 | 5 | | | | | | | | | | |
| | Butch Walts | 6 | 6 | 4 | 6 | Adriano Panatta | 6 | 3 | 5 | | | | | | | | | | |
| 6 | Adriano Panatta | 1 | 7 | 6 | | | | | | | | | | | | | | | |
| 6 | Adriano Panatta | 1 | 7 | 6 | | | | | | | | | | | 1 | Gene Mayer | 6 | 6 | 6 |
| | | | | | | | | | | | | | | | | Paul McNamee | 7 | 3 | 1 |
| 3 | Stan Smith | 2 | 2 | | | | | | | | | | | | | | | | | Paul McNamee | 7 | 3 | 1 |
| | Paul McNamee | 6 | 6 | | | | | | | | | | | | | | | | |
| | Paul McNamee | 6 | 6 | | | Paul McNamee | 6 | 6 | | | | | | | | | | | |
| | | | | | | Georges Goven | 4 | 4 | | | | | | | | | | | |
| Q | Paul van Min | 5 | 5 | | | Georges Goven | 4 | 4 | | | | | | | | | | | |
| | Georges Goven | 7 | 7 | | | | | | | | | | | | | | | | |
| | Georges Goven | 7 | 7 | | | | | | | | Paul McNamee | 6 | 6 | | | | | | |
| | | | | | | | | | | 7 | Vijay Amritraj | 3 | 4 | | | | | | |
| | Buster Mottram | 6 | 6 | | | | | | | | | | | 7 | Vijay Amritraj | 3 | 4 | | | | | | |
| WC | Eric Wilborts | 3 | 0 | | | | | | | | | | | | | | | | |
| WC | Eric Wilborts | 3 | 0 | | | Buster Mottram | 7 | 3 | 3 | | | | | | | | | | |
| | | | | | 7 | Vijay Amritraj | 6 | 6 | 6 | | | | | | | | | | |
| | Bernard Fritz | 4 | 3 | | 7 | Vijay Amritraj | 6 | 6 | 6 | | | | | | | | | | |
| 7 | Vijay Amritraj | 6 | 6 | | | | | | | | | | | | | | | | |

### 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 | Semifinals |
| LL | Bernard Boileau | 6 | 2 | 6 | | | | | | | | | | | | | | | | |
| | Frew McMillan | 3 | 6 | 3 | | | | | | | | | | | | | | | | |
| | Frew McMillan | 3 | 6 | 3 | LL | Bernard Boileau | 3 | 6 | 3 | | | | | | | | | | | |
| | | | | | | Ilie Năstase | 6 | 2 | 6 | | | | | | | | | | | |
| | Bill Scanlon | 6 | 1 | | | Ilie Năstase | 6 | 2 | 6 | | | | | | | | | | | |
| | Ilie Năstase | 7 | 6 | | | | | | | | | | | | | | | | | |
| | Ilie Năstase | 7 | 6 | | | | | | | | Ilie Năstase | 5 | 1 | | | | | | | |
| | | | | | | | | | | 4 | Ivan Lendl | 7 | 6 | | | | | | | |
| | Colin Dibley | 6 | 4 | | | | | | | | | | | | 4 | Ivan Lendl | 7 | 6 | | | | | | |
| | Terry Rocavert | 1 | 1 | r | | | | | | | | | | | | | | | | |
| | Terry Rocavert | 1 | 1 | r | | Colin Dibley | 2 | 1 | | | | | | | | | | | | |
| | | | | | 4 | Ivan Lendl | 6 | 6 | | | | | | | | | | | | |
| | Gianni Ocleppo | 3 | 4 | | 4 | Ivan Lendl | 6 | 6 | | | | | | | | | | | | |
| 4 | Ivan Lendl | 6 | 6 | | | | | | | | | | | | | | | | | |
| 4 | Ivan Lendl | 6 | 6 | | | | | | | | | | | | | 4 | Ivan Lendl | 6 | 6 | 3 |
| | | | | | | | | | | | | | | | | | Heinz Günthardt | 4 | 7 | 6 |
| 5 | Tim Gullikson | 3 | 4 | | | | | | | | | | | | | | | | | | Heinz Günthardt | 4 | 7 | 6 |
| | Johan Kriek | 6 | 6 | | | | | | | | | | | | | | | | | |
| | Johan Kriek | 6 | 6 | | | Johan Kriek | 4 | 0 | | | | | | | | | | | | |
| | | | | | | Heinz Günthardt | 6 | 6 | | | | | | | | | | | | |
| | Leo Palin | 5 | 3 | | | Heinz Günthardt | 6 | 6 | | | | | | | | | | | | |
| | Heinz Günthardt | 7 | 6 | | | | | | | | | | | | | | | | | |
| | Heinz Günthardt | 7 | 6 | | | | | | | | Heinz Günthardt | 7 | 5 | 6 | | | | | | |
| | | | | | | | | | | 2 | John Sadri | 6 | 7 | 2 | | | | | | |
| | Louk Sanders | 6 | 7 | | | | | | | | | | | | 2 | John Sadri | 6 | 7 | 2 | | | | | |
| | Carlos Kirmayr | 4 | 5 | | | | | | | | | | | | | | | | | |
| | Carlos Kirmayr | 4 | 5 | | | Louk Sanders | 2 | 2 | | | | | | | | | | | | |
| | | | | | 2 | John Sadri | 6 | 6 | | | | | | | | | | | | |
| | Hank Pfister | 4 | 4 | | 2 | John Sadri | 6 | 6 | | | | | | | | | | | | |
| 2 | John Sadri | 6 | 6 | | | | | | | | | | | | | | | | | |