2019 Australian Open – Wheelchair men's singles
# 2019 Australian Open – Wheelchair men's singles

Gustavo Fernández defeated Stefan Olsson in the final, 7–5, 6–3 to win the men's singles wheelchair tennis title at the 2019 Australian Open. It was his second Australian Open singles title and third major singles title overall.

Shingo Kunieda was the defending champion, but was defeated by Olsson in the semifinals.

## Seeds

* Shingo Kunieda (semifinals)
* Gustavo Fernández (champion)

## 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

### Draw

| First round | First round | First round | First round | First round | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final |
| - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| 1 | Shingo Kunieda | 6 | 6 | | | | | | | | | | |
| | Alfie Hewett | 1 | 4 | | | | | | | | | | |
| | Alfie Hewett | 1 | 4 | | 1 | Shingo Kunieda | 4 | 6 | 3 | | | | |
| | | | | | | Stefan Olsson | 6 | 3 | 6 | | | | |
| | Joachim Gérard | 4 | 3 | | | Stefan Olsson | 6 | 3 | 6 | | | | |
| | Stefan Olsson | 6 | 6 | | | | | | | | | | |
| | Stefan Olsson | 6 | 6 | | | | | | | | Stefan Olsson | 5 | 3 |
| | | | | | | | | | | 2 | Gustavo Fernández | 7 | 6 |
| | Gordon Reid | $6^8$ | 7 | 2 | | | | | | | | | | 2 | Gustavo Fernández | 7 | 6 |
| | Stéphane Houdet | $7^{10}$ | 5 | 6 | | | | | | | | | |
| | Stéphane Houdet | $7^{10}$ | 5 | 6 | | Stéphane Houdet | 4 | 7 | 1 | | | | |
| | | | | | 2 | Gustavo Fernández | 6 | 5 | 6 | | | | |
| WC | Ben Weekes | 1 | 1 | | 2 | Gustavo Fernández | 6 | 5 | 6 | | | | |
| 2 | Gustavo Fernández | 6 | 6 | | | | | | | | | | |
