# 1980 Custom Credit Australian Indoor Championships – Singles

Vitas Gerulaitis was the defending champion but lost in the final 6–3, 6–4 to John McEnroe.

## Seeds

* John McEnroe (champion)
* Gene Mayer (semifinals)
* Vitas Gerulaitis (final)
* Wojciech Fibak (first round)
* John Sadri (quarterfinals)
* Johan Kriek (semifinals)
* Bill Scanlon (quarterfinals)
* Phil Dent (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 |
| 1 | John McEnroe | 6 | 6 | | | | |
| 6 | Johan Kriek | 4 | 4 | | | | |
| 6 | Johan Kriek | 4 | 4 | 1 | John McEnroe | 6 | 6 |
| | | | | 3 | Vitas Gerulaitis | 3 | 4 |
| 3 | Vitas Gerulaitis | 6 | 6 | 3 | Vitas Gerulaitis | 3 | 4 |
| 2 | Gene Mayer | 4 | 3 | | | | |

### 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 | J McEnroe | 6 | 6 | | | | | | | | | | | | | | | |
| | S Mayer | 3 | 3 | | 1 | J McEnroe | 6 | 6 | | | | | | | | | | |
| | R Frawley | 6 | 6 | | | R Frawley | 1 | 2 | | | | | | | | | | |
| | V Van Patten | 1 | 2 | | | | | | | 1 | J McEnroe | 6 | 6 | | | | | |
| | T Gullikson | 2 | 6 | 6 | | | | | | | T Gullikson | 2 | 4 | | | | | |
| | K Warwick | 6 | 3 | 4 | | T Gullikson | 6 | 7 | | | | | | | | | | |
| | T Gorman | 3 | 6 | 4 | 8 | P Dent | 4 | 5 | | | | | | | | | | |
| 8 | P Dent | 6 | 4 | 6 | | | | | | | | | | | 1 | J McEnroe | 6 | 6 |
| 4 | W Fibak | 6 | 4 | 6 | | | | | | | | | | | 6 | J Kriek | 4 | 4 |
| | P Feigl | 1 | 6 | 7 | | P Feigl | 6 | 7 | | | | | | | | | | |
| | B Walts | 6 | 6 | | | B Walts | 3 | 6 | | | | | | | | | | |
| | P Fleming | 4 | 3 | | | | | | | | P Feigl | 3 | 6 | 6 | | | | |
| | P McNamara | 6 | 6 | | | | | | | 6 | J Kriek | 6 | 3 | 7 | | | | |
| | M Edmondson | 3 | 2 | | | P McNamara | 3 | 7 | 2 | | | | | | | | | |
| | J Alexander | 2 | 5 | | 6 | J Kriek | 6 | 6 | 6 | | | | | | | | | |
| 6 | J Kriek | 6 | 7 | | | | | | | | | | | | | | | |

### 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 | B Scanlon | 6 | 6 | 6 | | | | | | | | | | | | | |
| Q | F Buehning | 7 | 4 | 3 | 7 | B Scanlon | 6 | 6 | | | | | | | | | |
| Q | C Johnstone | 6 | 6 | | Q | C Johnstone | 1 | 2 | | | | | | | | | |
| | G Masters | 2 | 1 | | | | | | | 7 | B Scanlon | 3 | 3 | | | | |
| | F Taygan | 3 | 6 | 6 | | | | | | 3 | V Gerulaitis | 6 | 6 | | | | |
| | C Delaney | 6 | 2 | 2 | | F Taygan | 4 | 0 | | | | | | | | | |
| | P McNamee | 2 | 2 | | 3 | V Gerulaitis | 6 | 6 | | | | | | | | | |
| 3 | V Gerulaitis | 6 | 6 | | | | | | | | | | | 3 | V Gerulaitis | 6 | 6 |
| 5 | J Sadri | 6 | 6 | | | | | | | | | | | 2 | G Mayer | 4 | 3 |
| | F González | 1 | 3 | | 5 | J Sadri | 7 | 3 | 6 | | | | | | | | |
| | K Rosewall | 6 | 7 | | | K Rosewall | 5 | 6 | 3 | | | | | | | | |
| | T Wilkison | 4 | 5 | | | | | | | 5 | J Sadri | 6 | 4 | | | | |
| | T Roche | 6 | 7 | | | | | | | 2 | G Mayer | 7 | 6 | | | | |
| | J Newcombe | 4 | 6 | | | T Roche | 3 | 0 | | | | | | | | | |
| | P Du Pré | 3 | 7 | 2 | 2 | G Mayer | 6 | 6 | | | | | | | | | |
| 2 | G Mayer | 6 | 6 | 6 | | | | | | | | | | | | | |