# 2018 Brisbane International – Men's singles

Grigor Dimitrov was the defending champion, but lost in the semifinals to Nick Kyrgios.
Kyrgios went on to win the title, defeating Ryan Harrison in the final, 6–4, 6–2.

## Seeds

The top four seeds receive a bye into the second round.
* Grigor Dimitrov (semifinals)
* Andy Murray (withdrew due to injury)
* Nick Kyrgios (champion)
* Milos Raonic (second round)
* Gilles Müller (first round)
* Diego Schwartzman (first round)
* Damir Džumhur (first round)
* Mischa Zverev (second round)

## Draw
### Finals

| Semifinals | Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final |
| 1 | Grigor Dimitrov | 6 | 1 | 4 | | | | |
| 3 | Nick Kyrgios | 3 | 6 | 6 | | | | |
| 3 | Nick Kyrgios | 3 | 6 | 6 | 3 | Nick Kyrgios | 6 | 6 |
| | | | | | | Ryan Harrison | 4 | 2 |
| WC | Alex de Minaur | 6 | 6$^5$ | 4 | | Ryan Harrison | 4 | 2 |
| | Ryan Harrison | 4 | 7$^7$ | 6 | | | | |

### 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 | Semifinals |
| | | | | | 1 | G Dimitrov | 4 | 7$^{10}$ | 6 | | | | | | | | | | |
| Q | P Polansky | 6$^4$ | 0 | | WC | J Millman | 6 | 6$^8$ | 3 | | | | | | | | | | |
| WC | J Millman | 7$^7$ | 6 | | | | | | | 1 | G Dimitrov | 6 | 6$^3$ | 6 | | | | | |
| | D Shapovalov | 7$^7$ | 6$^4$ | 4 | | | | | | | K Edmund | 3 | 7$^7$ | 4 | | | | | |
| | K Edmund | 6$^5$ | 7$^7$ | 6 | | K Edmund | 7$^7$ | 5 | 6 | | | | | | | | | | |
| | H Chung | 6 | 7$^7$ | | | H Chung | 6$^3$ | 7 | 4 | | | | | | | | | | |
| 5 | G Müller | 3 | 6$^1$ | | | | | | | | | | | | 1 | G Dimitrov | 6 | 1 | 4 |
| | | | | | | | | | | | | | | | 3 | N Kyrgios | 3 | 6 | 6 |
| | | | | | 3 | N Kyrgios | 6$^3$ | 7$^7$ | 6 | | | | | | | | | | |
| | F Tiafoe | 3 | 2 | | | M Ebden | 7$^7$ | 6$^5$ | 2 | | | | | | | | | | |
| | M Ebden | 6 | 6 | | | | | | | 3 | N Kyrgios | 1 | 6 | 6 | | | | | |
| Q | E Escobedo | 3 | 4 | | | | | | | | A Dolgopolov | 6 | 3 | 4 | | | | | |
| | H Zeballos | 6 | 6 | | | H Zeballos | 1 | 2 | | | | | | | | | | | |
| | A Dolgopolov | 6 | 7$^7$ | | | A Dolgopolov | 6 | 6 | | | | | | | | | | | |
| 6 | D Schwartzman | 4 | 6$^3$ | | | | | | | | | | | | | | | | |

### 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 | Semifinals |
| 8 | M Zverev | 6 | 7 | | | | | | | | | | | | | | | |
| Q | J-P Smith | 4 | 5 | | 8 | M Zverev | 2 | 7 | 4 | | | | | | | | | |
| | F Delbonis | 3 | 4 | | Q | M Mmoh | 6 | 5 | 6 | | | | | | | | | |
| Q | M Mmoh | 6 | 6 | | | | | | | Q | M Mmoh | 4 | 0 | | | | | |
| | S Johnson | 6$^7$ | 4 | | | | | | | WC | A de Minaur | 6 | 6 | | | | | |
| WC | A de Minaur | 7$^9$ | 6 | | WC | A de Minaur | 6 | 6 | | | | | | | | | | |
| | | | | | 4 | M Raonic | 4 | 4 | | | | | | | | | | |
| | | | | | | | | | | | | | | WC | A de Minaur | 6 | 6$^5$ | 4 |
| 7 | D Džumhur | 7$^7$ | 3 | 2 | | | | | | | | | | | R Harrison | 4 | 7$^7$ | 6 |
| | D Istomin | 6$^4$ | 6 | 6 | | D Istomin | 7$^7$ | 6 | | | | | | | | | | |
| | J Donaldson | 6 | 6 | | | J Donaldson | 6$^5$ | 2 | | | | | | | | | | |
| WC | J Thompson | 2 | 4 | | | | | | | | D Istomin | 6$^6$ | 2$^r$ | | | | | |
| | R Harrison | 6 | 3 | 6 | | | | | | | R Harrison | 7$^8$ | 4 | | | | | |
| | L Mayer | 4 | 6 | 2 | | R Harrison | 6$^5$ | 6 | 6 | | | | | | | | | |
| | | | | | LL | Y Hanfmann | 7$^7$ | 4 | 2 | | | | | | | | | |

## Qualifying
### Seeds

* Alexander Bublik (first round)
* Yannick Hanfmann (qualifying competition; lucky loser)
* Ernesto Escobedo (qualified)
* Quentin Halys (first round)
* Peter Polansky (qualified)
* Sebastian Ofner (qualifying competition)
* Renzo Olivo (first round)
* Jozef Kovalík (qualifying competition)

### Qualifiers

* John-Patrick Smith
* Peter Polansky
* Ernesto Escobedo
* Michael Mmoh

### Lucky loser

* Yannick Hanfmann

### Qualifying draw
#### First qualifier

| First round | First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 1 | Alexander Bublik | 4 | 4 | | | | | | |
| Alt | John-Patrick Smith | 6 | 6 | | | | | | |
| Alt | John-Patrick Smith | 6 | 6 | | Alt | John-Patrick Smith | 6 | 3 | 7$^7$ |
| | | | | | | Viktor Galović | 4 | 6 | 6$^2$ |
| | Viktor Galović | 4 | 6 | 6 | | Viktor Galović | 4 | 6 | 6$^2$ |
| 7 | Renzo Olivo | 6 | 3 | 2 | | | | | |

#### Second qualifier

| First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 2 | Yannick Hanfmann | 6 | 7$^9$ | | | | | |
| WC | Sam Groth | 4 | 6$^7$ | | | | | |
| WC | Sam Groth | 4 | 6$^7$ | 2 | Yannick Hanfmann | 1 | 6 | 3 |
| | | | | 5 | Peter Polansky | 6 | 3 | 6 |
| | Filip Peliwo | 2 | 2 | 5 | Peter Polansky | 6 | 3 | 6 |
| 5 | Peter Polansky | 6 | 6 | | | | | |

#### Third qualifier

| First round | First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 3 | Ernesto Escobedo | 6 | 4 | 6 | | | | |
| WC | James Duckworth | 2 | 6 | 4 | | | | |
| WC | James Duckworth | 2 | 6 | 4 | 3 | Ernesto Escobedo | 6 | 7$^7$ |
| | | | | | 8 | Jozef Kovalík | 2 | 6$^4$ |
| | Denis Kudla | 6$^5$ | 4 | | 8 | Jozef Kovalík | 2 | 6$^4$ |
| 8 | Jozef Kovalík | 7$^7$ | 6 | | | | | |

#### Fourth qualifier

| First round | First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 4 | Quentin Halys | 4 | 4 | | | | | |
| | Michael Mmoh | 6 | 6 | | | | | |
| | Michael Mmoh | 6 | 6 | | | Michael Mmoh | 6 | 6 |
| | | | | | 6 | Sebastian Ofner | 4 | 3 |
| | Marcelo Arévalo | 6 | 6$^3$ | 2 | 6 | Sebastian Ofner | 4 | 3 |
| 6 | Sebastian Ofner | 2 | 7$^7$ | 6 | | | | |