| Champ: |  Daniil Medvedev |
| Runner: |  Alex de Minaur |
| Score: | 1–6, 6–4, 7–5 |
| Draw: | 28 (4 / 3) |
| Seeds: | 8 |
| Before Name: | Apia International Sydney |
See main article: 2018 Sydney International.
Gilles Müller was the defending champion, but lost in the quarterfinals to Benoît Paire.
Daniil Medvedev won his first ATP title, defeating Alex de Minaur in the final, 1–6, 6–4, 7–5.
The top four seeds receive a bye into the second round.