# 1984 Donnay Indoor Championships – Singles

Peter McNamara was the defending champion, but did not participate this year.
John McEnroe won the title, defeating Ivan Lendl 6–1, 6–3 in the final.

## Seeds

* Ivan Lendl (final)
* John McEnroe (champion)
* Mats Wilander (first round)
* Kevin Curren (first round)
* Eliot Teltscher (second round)
* Bill Scanlon (first round)
* Johan Kriek (quarterfinals)
* Gene Mayer (quarterfinals)

## 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 |
| 1 | Ivan Lendl | 6 | 6 | | | | |
| | Tomáš Šmíd | 1 | 2 | | | | |
| | Tomáš Šmíd | 1 | 2 | 1 | Ivan Lendl | 1 | 3 |
| | | | | 2 | John McEnroe | 6 | 6 |
| Q | Thomas Högstedt | 3 | 1 | 2 | John McEnroe | 6 | 6 |
| 2 | John McEnroe | 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 | I Lendl | 6 | 6 | | | | | | | | | | | | | | |
| Q | B Gilbert | 1 | 0 | | 1 | I Lendl | 6 | 6 | | | | | | | | | |
| | A Järryd | 0 | 6 | 6 | | A Järryd | 4 | 2 | | | | | | | | | |
| | W Fibak | 6 | 4 | 0 | | | | | | 1 | I Lendl | 6 | 6 | | | | |
| | S Davis | 3 | 4 | | | | | | | 8 | G Mayer | 3 | 4 | | | | |
| Q | P Cash | 6 | 6 | | Q | P Cash | 3 | 3 | | | | | | | | | |
| | H Leconte | 4 | 3 | | 8 | G Mayer | 6 | 6 | | | | | | | | | |
| 8 | G Mayer | 6 | 6 | | | | | | | | | | | 1 | I Lendl | 6 | 6 |
| 3 | M Wilander | 5 | 5 | | | | | | | | | | | | T Šmid | 1 | 2 |
| | T Šmid | 7 | 7 | | | T Šmid | 6 | 2 | 6 | | | | | | | | |
| | B Teacher | 2 | 5 | | | H Pfister | 3 | 6 | 0 | | | | | | | | |
| | H Pfister | 6 | 7 | | | | | | | | T Šmid | 6 | 6 | | | | |
| | M Purcell | 0 | 6 | 1 | | | | | | | H Sundström | 0 | 4 | | | | |
| | H Günthardt | 6 | 0 | 6 | | H Günthardt | 3 | 1 | | | | | | | | | |
| | H Sundström | 7 | 2 | 7 | | H Sundström | 6 | 6 | | | | | | | | | |
| 6 | B Scanlon | 6 | 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 | E Teltscher | 6 | 3 | 6 | | | | | | | | | | | | | | |
| | J Nyström | 3 | 6 | 2 | 5 | E Teltscher | 4 | 3 | | | | | | | | | | |
| | J Vanlangendonck | 6 | 5 | 5 | Q | T Högstedt | 6 | 6 | | | | | | | | | | |
| Q | T Högstedt | 4 | 7 | 7 | | | | | | Q | T Högstedt | 6 | 4 | 6 | | | | |
| | K Demuynck | 6 | 1 | 4 | | | | | | | B Boileau | 4 | 6 | 3 | | | | |
| | R Van't Hof | 4 | 6 | 6 | | R Van't Hof | 5 | 6 | 1 | | | | | | | | | |
| | B Boileau | 6 | 6 | | | B Boileau | 7 | 3 | 6 | | | | | | | | | |
| 4 | K Curren | 3 | 4 | | | | | | | | | | | | Q | T Högstedt | 3 | 1 |
| 7 | J Kriek | 6 | 3 | 6 | | | | | | | | | | | 2 | J McEnroe | 6 | 6 |
| | B Gottfried | 3 | 6 | 4 | 7 | J Kriek | 6 | 6 | | | | | | | | | | |
| | V Gerulaitis | 6 | 6 | | | V Gerulaitis | 4 | 4 | | | | | | | | | | |
| | C Dowdeswell | 2 | 3 | | | | | | | 7 | J Kriek | 3 | 1 | | | | | |
| | T Gullikson | 7 | 2 | 4 | | | | | | 2 | J McEnroe | 6 | 6 | | | | | |
| Q | M Ostoja | 6 | 6 | 6 | Q | M Ostoja | 1 | 2 | | | | | | | | | | |
| | T Mayotte | 1 | 1 | | 2 | J McEnroe | 6 | 6 | | | | | | | | | | |
| 2 | J McEnroe | 6 | 6 | | | | | | | | | | | | | | | |