# 1978 Custom Credit Australian Indoor Championships – Singles

Jimmy Connors was the defending champion and won in the final 6–0, 6–0, 6–4 against Geoff Masters.

## Seeds

* Jimmy Connors (champion)
* Raúl Ramírez (first round)
* Arthur Ashe (second round)
* John Alexander (first round)
* Tony Roche (first round)
* Tom Gorman (second round)
* John Newcombe (semifinals)
* Ken Rosewall (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
| Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final | Final |
| 1 | Jimmy Connors | 6 | 6 | | | | | |
| | Pat Du Pré | 3 | 1 | | | | | |
| | Pat Du Pré | 3 | 1 | 1 | Jimmy Connors | 6 | 6 | 6 |
| | | | | | Geoff Masters | 0 | 0 | 4 |
| | Geoff Masters | 6 | 6 | | Geoff Masters | 0 | 0 | 4 |
| 8 | Ken Rosewall | 2 | 3 | | | | | |

### Section 1

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 1 | J Connors | 6 | 6 | | | | | | | | | | | | | | |
| | C Dibley | 4 | 1 | | 1 | J Connors | 6 | 6 | | | | | | | | | |
| | B Giltinan | 2 | 6 | | | M Edmondson | 2 | 2 | | | | | | | | | |
| | M Edmondson | 6 | 7 | | | | | | 1 | J Connors | 6 | 7 | | | | | |
| | P McNamara | 7 | 6 | | | | | | 7 | J Newcombe | 4 | 6 | | | | | |
| | J Marks | 6 | 1 | | | P McNamara | 1 | 4 | | | | | | | | | |
| | F McNair | 6 | 5 | 2 | 7 | J Newcombe | 6 | 6 | | | | | | | | | |
| 7 | J Newcombe | 3 | 7 | 6 | | | | | | | | | | 1 | J Connors | 6 | 6 |
| 3 | A Ashe | 7 | 6 | | | | | | | | | | | | P Du Pré | 3 | 1 |
| | K Warwick | 6 | 3 | | 3 | A Ashe | 3 | 1 | | | | | | | | | |
| | S Menon | 3 | 4 | | | P Du Pré | 6 | 6 | | | | | | | | | |
| | P Du Pré | 6 | 6 | | | | | | | P Du Pré | 6 | 6 | 6 | | | | |
| | A Stone | 7 | 4 | 4 | | | | | | S Stewart | 7 | 3 | 2 | | | | |
| | S Stewart | 5 | 6 | 6 | | S Stewart | 7 | 6 | | | | | | | | | |
| | N Saviano | 7 | 7 | | | N Saviano | 6 | 2 | | | | | | | | | |
| 5 | T Roche | 6 | 6 | | | | | | | | | | | | | | |

### 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 |
| 6 | T Gorman | 6 | 6 | | | | | | | | | | | | | | | |
| | E Teltscher | 4 | 4 | | 6 | T Gorman | 5 | 1 | | | | | | | | | | |
| | L Hall | 1 | 4 | | | T Rocavert | 7 | 6 | | | | | | | | | | |
| | T Rocavert | 6 | 6 | | | | | | | | T Rocavert | 0 | 1 | | | | | |
| | C Kachel | 2 | 4 | | | | | | | | G Masters | 6 | 6 | | | | | |
| | G Masters | 6 | 6 | | | G Masters | 6 | 6 | | | | | | | | | | |
| | H Pfister | 6 | 4 | 6 | | H Pfister | 4 | 4 | | | | | | | | | | |
| 4 | J Alexander | 2 | 6 | 2 | | | | | | | | | | | | G Masters | 6 | 6 |
| 8 | K Rosewall | 6 | 6 | | | | | | | | | | | | 8 | K Rosewall | 2 | 3 |
| | D Crealy | 1 | 4 | | 8 | K Rosewall | 6 | 6 | | | | | | | | | | |
| | B Walts | 6 | 6 | 1 | | B Drewett | 0 | 4 | | | | | | | | | | |
| | B Drewett | 7 | 4 | 6 | | | | | | 8 | K Rosewall | 6 | 3 | 6 | | | | |
| | R Kelly | 4 | 2 | | | | | | | | P Dent | 1 | 6 | 3 | | | | |
| | P Dent | 6 | 6 | | | P Dent | 6 | 7 | 6 | | | | | | | | | |
| | R Case | 6 | 3 | 6 | | R Case | 7 | 6 | 4 | | | | | | | | | |
| 2 | R Ramírez | 4 | 6 | 4 | | | | | | | | | | | | | | |