# 1987 Donnay Indoor Championships – Singles

Mats Wilander was the defending champion.
Wilander successfully defended his title, defeating John McEnroe 6–3, 6–4 in the final.

## Seeds

* Boris Becker (quarterfinals)
* Mats Wilander (champion)
* John McEnroe (final)
* Emilio Sánchez (first round)
* Jonas Svensson (semifinals)
* Jakob Hlasek (quarterfinals)
* Anders Järryd (semifinals)
* Amos Mansdorf (second 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 |
| 7 | Anders Järryd | 3 | 3 | | | | |
| 3 | John McEnroe | 6 | 6 | | | | |
| 3 | John McEnroe | 6 | 6 | 3 | John McEnroe | 3 | 4 |
| | | | | 2 | Mats Wilander | 6 | 6 |
| 5 | Jonas Svensson | 3 | 2 | 2 | Mats Wilander | 6 | 6 |
| 2 | Mats Wilander | 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 | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 1 | B Becker | 7 | 6 | | | | | | | | | | | | | | | |
| LL | P Lindgren | 6 | 3 | | 1 | B Becker | 3 | 6 | 6 | | | | | | | | | |
| | S Živojinović | 6 | 6 | | | S Živojinović | 6 | 4 | 4 | | | | | | | | | |
| | E Jelen | 4 | 3 | | | | | | | 1 | B Becker | 6 | 3 | 4 | | | | |
| | S Casal | 6 | 4 | | | | | | | 7 | A Järryd | 4 | 6 | 6 | | | | |
| | A Chesnokov | 7 | 6 | | | A Chesnokov | 2 | 3 | | | | | | | | | | |
| | L Pimek | 3 | 3 | | 7 | A Järryd | 6 | 6 | | | | | | | | | | |
| 7 | A Järryd | 6 | 6 | | | | | | | | | | | | 7 | A Järryd | 3 | 3 |
| 3 | J McEnroe | 6 | 6 | | | | | | | | | | | | 3 | J McEnroe | 6 | 6 |
| | P Canè | 3 | 1 | | 3 | J McEnroe | 7 | 6 | | | | | | | | | | |
| | T Šmid | 6 | 4 | | Q | T Högstedt | 6 | 1 | | | | | | | | | | |
| Q | T Högstedt | 7 | 6 | | | | | | | 3 | J McEnroe | 6 | 7 | | | | | |
| WC | J Vanlangendonck | 5 | 7 | 3 | | | | | | 6 | J Hlasek | 3 | 5 | | | | | |
| | M Leach | 7 | 6 | 6 | | M Leach | 6 | 5 | 3 | | | | | | | | | |
| | J Canter | 2 | 4 | | 6 | J Hlasek | 2 | 7 | 6 | | | | | | | | | |
| 6 | J Hlasek | 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 | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 5 | J Svensson | 6 | 6 | | | | | | | | | | | | | | | |
| | P Arraya | 3 | 3 | | 5 | J Svensson | 6 | 5 | 6 | | | | | | | | | |
| | C Limberger | 7 | 2 | 6 | | C Limberger | 2 | 7 | 3 | | | | | | | | | |
| WC | K Demuynck | 5 | 6 | 4 | | | | | | 5 | J Svensson | 6 | 6 | | | | | |
| | S Colombo | 6 | 4 | 6 | | | | | | | J Gunnarsson | 3 | 3 | | | | | |
| | K Nováček | 2 | 6 | 4 | | S Colombo | 6 | 0 | 1 | | | | | | | | | |
| | J Gunnarsson | 6 | 7 | | | J Gunnarsson | 3 | 6 | 6 | | | | | | | | | |
| 4 | E Sánchez | 1 | 6 | | | | | | | | | | | | 5 | J Svensson | 3 | 2 |
| 8 | A Mansdorf | 6 | 6 | | | | | | | | | | | | 2 | M Wilander | 6 | 6 |
| | B Dyke | 3 | 3 | | 8 | A Mansdorf | 6 | 6 | 4 | | | | | | | | | |
| WC | Christoph Geukens | 3 | 2 | | Q | G Bloom | 1 | 7 | 6 | | | | | | | | | |
| Q | G Bloom | 6 | 6 | | | | | | | Q | G Bloom | 7 | 3 | 2 | | | | |
| Q | M Kratzmann | 4 | 6 | 6 | | | | | | 2 | M Wilander | 5 | 6 | 6 | | | | |
| | D Pérez | 6 | 3 | 2 | Q | M Kratzmann | 0 | 2 | | | | | | | | | | |
| Q | E Masso | 5 | 2 | | 2 | M Wilander | 6 | 6 | | | | | | | | | | |
| 2 | M Wilander | 7 | 6 | | | | | | | | | | | | | | | |