# 1983 Custom Credit Australian Indoor Championships – Singles

John McEnroe was the defending champion and won in the final 6–1, 6–4, 7–5 against Henri Leconte.

## Seeds

* John McEnroe (champion)
* Ivan Lendl (quarterfinals)
* Kevin Curren (second round)
* Steve Denton (first round)
* Henri Leconte (final)
* Chris Lewis (first round)
* Mark Edmondson (second round)
* Pat Cash (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 | Semifinals | Final | Final | Final | Final | Final |
| 1 | John McEnroe | 6 | 6 | | | | | | |
| | Chip Hooper | 4 | 1 | | | | | | |
| | Chip Hooper | 4 | 1 | | 1 | John McEnroe | 6 | 6 | 7 |
| | | | | | 5 | Henri Leconte | 1 | 4 | 5 |
| | Paul McNamee | 7 | 4 | 0 | 5 | Henri Leconte | 1 | 4 | 5 |
| 5 | Henri Leconte | 6 | 6 | 6 | | | | | |

### Section 1

| 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 | J McEnroe | 6 | 6 | | | | | | | | | | | | | | |
| | J McCurdy | 3 | 3 | | 1 | J McEnroe | 6 | 6 | | | | | | | | | |
| | B Gilbert | 7 | 6 | | | B Gilbert | 2 | 0 | | | | | | | | | |
| | V Van Patten | 6 | 0 | | | | | | | 1 | J McEnroe | 6 | 6 | | | | |
| Q | J Canter | 2 | 6 | 7 | | | | | | | J Fitzgerald | 2 | 2 | | | | |
| | M Leach | 6 | 3 | 6 | Q | J Canter | 6 | 4 | | | | | | | | | |
| | J Fitzgerald | 6 | 7 | | | J Fitzgerald | 7 | 6 | | | | | | | | | |
| 8 | P Cash | 2 | 6 | | | | | | | | | | | 1 | J McEnroe | 6 | 6 |
| 3 | K Curren | 6 | 6 | | | | | | | | | | | | C Hooper | 4 | 1 |
| Q | P Johnston | 4 | 2 | | 3 | K Curren | 3 | 6 | 6 | | | | | | | | |
| | C Wittus | 6 | 3 | | | J Alexander | 6 | 4 | 7 | | | | | | | | |
| | J Alexander | 7 | 6 | | | | | | | | J Alexander | 4 | 3 | | | | |
| | M Mitchell | 6 | 6 | | | | | | | | C Hooper | 6 | 6 | | | | |
| | K Warwick | 4 | 4 | | | M Mitchell | 4 | 3 | | | | | | | | | |
| | C Hooper | 7 | 4 | 6 | | C Hooper | 6 | 6 | | | | | | | | | |
| 6 | C Lewis | 6 | 6 | 4 | | | | | | | | | | | | | |

### Section 2

| 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 |
| 7 | M Edmondson | 6 | 4 | 6 | | | | | | | | | | | | | | | |
| | M De Palmer | 4 | 6 | 3 | 7 | M Edmondson | 6 | 6 | 4 | | | | | | | | | | |
| | F González | 4 | 4 | | | P Rennert | 3 | 7 | 6 | | | | | | | | | | |
| | P Rennert | 6 | 6 | | | | | | | | P Rennert | 1 | 2 | | | | | | |
| | S Youl | 4 | 0 | | | | | | | | P McNamee | 6 | 6 | | | | | | |
| | C Roger-Vasselin | 6 | 6 | | | C Roger-Vasselin | 7 | 6 | 6 | | | | | | | | | | |
| | P McNamee | 6 | 7 | | | P McNamee | 6 | 7 | 7 | | | | | | | | | | |
| 4 | S Denton | 4 | 6 | | | | | | | | | | | | | P McNamee | 7 | 4 | 0 |
| 5 | H Leconte | 6 | 6 | | | | | | | | | | | | 5 | H Leconte | 6 | 6 | 6 |
| | W Masur | 2 | 2 | | 5 | H Leconte | 6 | 6 | | | | | | | | | | | |
| | B Drewett | 6 | 6 | | | B Drewett | 1 | 3 | | | | | | | | | | | |
| Q | D Mustard | 2 | 2 | | | | | | | 5 | H Leconte | 6 | 3 | 7 | | | | | |
| Q | F Taygan | 2 | 4 | | | | | | | 2 | I Lendl | 3 | 6 | 5 | | | | | |
| | F Buehning | 6 | 6 | | | F Buehning | 3 | 3 | | | | | | | | | | | |
| | R Frawley | 3 | 3 | | 2 | I Lendl | 6 | 6 | | | | | | | | | | | |
| 2 | I Lendl | 6 | 6 | | | | | | | | | | | | | | | | |