# 1981 Dutch Open – Singles

Balázs Taróczy became the 4-time consecutive champion after defeating Heinz Günthardt 6–3, 6–7, 6–4 in the final.

## Seeds

* Wojciech Fibak (semifinals)
* Balázs Taróczy (champion)
* Tomáš Šmíd (quarterfinals)
* Shlomo Glickstein (quarterfinals)
* Heinz Günthardt (final)
* Jeff Borowiak (quarterfinals)
* Peter Elter (first round)
* Ramesh Krishnan (first round)

## Draw
### Key

* Q = Qualifier
* WC = Wild card
* LL = Lucky loser
* Alt = Alternate
* SE = Special exempt
* PR = Protected ranking
* ITF = ITF entry
* JE = Junior exempt
* w/o = Walkover
* r = Retired
* d = Defaulted
* SR = Special ranking

### Finals

| Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final | Final |
| 1 | Wojciech Fibak | 3 | 1 | | | | | |
| 5 | Heinz Günthardt | 6 | 6 | | | | | |
| 5 | Heinz Günthardt | 6 | 6 | 5 | Heinz Günthardt | 3 | 7 | 4 |
| | | | | 2 | Balázs Taróczy | 6 | 6 | 6 |
| | Roland Stadler | 2 | 1 | 2 | Balázs Taróczy | 6 | 6 | 6 |
| 2 | Balázs Taróczy | 6 | 6 | | | | | |

### Top 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 |
| 1 | W Fibak | 6 | 6 | | | | | | | | | | | | | | |
| | T Graham | 3 | 1 | | 1 | W Fibak | 7 | 5 | 11 | | | | | | | | |
| | H Ismail | 6 | 4 | 6 | | H Ismail | 6 | 7 | 9 | | | | | | | | |
| | J Kodeš | 2 | 6 | 3 | | | | | | 1 | W Fibak | 6 | 6 | | | | |
| | É Deblicker | 6 | 6 | | | | | | | | E Iskersky | 4 | 3 | | | | |
| | L Sanders | 2 | 4 | | | É Deblicker | 6 | 1 | 1 | | | | | | | | |
| | E Iskersky | 6 | 6 | | | E Iskersky | 3 | 6 | 6 | | | | | | | | |
| 8 | R Krishnan | 0 | 2 | | | | | | | | | | | 1 | W Fibak | 3 | 1 |
| 3 | T Šmíd | 6 | 6 | | | | | | | | | | | 5 | H Günthardt | 6 | 6 |
| | M Albert | 0 | 2 | | 3 | T Šmíd | 6 | 6 | | | | | | | | | |
| | C Castellan | 7 | 6 | | | C Castellan | 3 | 4 | | | | | | | | | |
| | R Acuña | 5 | 1 | | | | | | | 3 | T Šmíd | 3 | 0 | | | | |
| | W Pascoe | 2 | 6 | | | | | | | 5 | H Günthardt | 6 | 6 | | | | |
| | D Collings | 6 | 7 | | | D Collings | 2 | 2 | | | | | | | | | |
| | W Maher | 3 | 2 | | 5 | H Günthardt | 6 | 6 | | | | | | | | | |
| 5 | H Günthardt | 6 | 6 | | | | | | | | | | | | | | |

### Bottom 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 |
| 7 | P Elter | 4 | 3 | | | | | | | | | | | | | | |
| | R Moore | 6 | 6 | | | R Moore | 0 | 1 | | | | | | | | | |
| | R Stadler | 6 | 2 | 6 | | R Stadler | 6 | 6 | | | | | | | | | |
| | K Eberhard | 3 | 6 | 2 | | | | | | | R Stadler | 6 | 6 | | | | |
| | M Mir | 4 | 1 | | | | | | | 4 | S Glickstein | 3 | 3 | | | | |
| | B Guan | 6 | 6 | | | B Guan | 3 | 3 | | | | | | | | | |
| | A Pattison | 5 | 6 | | 4 | S Glickstein | 6 | 6 | | | | | | | | | |
| 4 | S Glickstein | 7 | 7 | | | | | | | | | | | | R Stadler | 2 | 1 |
| 6 | J Borowiak | 6 | 6 | | | | | | | | | | | 2 | B Taróczy | 6 | 6 |
| | E Wilborts | 3 | 4 | | 6 | J Borowiak | 6 | 6 | | | | | | | | | |
| | HP Kandler | 5 | 7 | 7 | | G Aubone | 2 | 2 | | | | | | | | | |
| | G Aubone | 7 | 6 | 9 | | | | | | 6 | J Borowiak | 2 | 3 | | | | |
| | M Estep | 3 | 6 | 2 | | | | | | 2 | B Taróczy | 6 | 6 | | | | |
| | R Venter | 6 | 3 | 6 | | R Venter | 6 | 1 | 3 | | | | | | | | |
| | R Benavides | 3 | 2 | | 2 | B Taróczy | 4 | 6 | 6 | | | | | | | | |
| 2 | B Taróczy | 6 | 6 | | | | | | | | | | | | | | |