| Men's singles | |
|---|---|
| 2018 Brisbane International | |
| Champion |  Nick Kyrgios |
| Runner-up |  Ryan Harrison |
| Final score | 6–4, 6–2 |
| Draw | 28 (4 Q / 3 WC ) |
| Seeds | 8 |
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.
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)| Semifinals | Final | ||||||||||||
| 1 | Grigor Dimitrov | 6 | 1 | 4 | |||||||||
| 3 | Nick Kyrgios | 3 | 6 | 6 | |||||||||
| 3 | Nick Kyrgios | 6 | 6 | ||||||||||
| Ryan Harrison | 4 | 2 | |||||||||||
| WC | Alex de Minaur | 6 | 65 | 4 | |||||||||
| Ryan Harrison | 4 | 77 | 6 | ||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 1 | G Dimitrov | 4 | 710 | 6 | |||||||||||||||||||||||
| Q | P Polansky | 64 | 0 | WC | J Millman | 6 | 68 | 3 | |||||||||||||||||||
| WC | J Millman | 77 | 6 | 1 | G Dimitrov | 6 | 63 | 6 | |||||||||||||||||||
| D Shapovalov | 77 | 64 | 4 | K Edmund | 3 | 77 | 4 | ||||||||||||||||||||
| K Edmund | 65 | 77 | 6 | K Edmund | 77 | 5 | 6 | ||||||||||||||||||||
 H Chung | 6 | 77 | H Chung | 63 | 7 | 4 | |||||||||||||||||||||
| 5 | G Müller | 3 | 61 | 1 | G Dimitrov | 6 | 1 | 4 | |||||||||||||||||||
| 3 | N Kyrgios | 3 | 6 | 6 | |||||||||||||||||||||||
| 3 | N Kyrgios | 63 | 77 | 6 | |||||||||||||||||||||||
| F Tiafoe | 3 | 2 | M Ebden | 77 | 65 | 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 | 77 | A Dolgopolov | 6 | 6 | ||||||||||||||||||||||
| 6 | D Schwartzman | 4 | 63 | ||||||||||||||||||||||||
| First round | Second round | Quarterfinals | 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 | 67 | 4 | WC | A de Minaur | 6 | 6 | |||||||||||||||||||||
| WC | A de Minaur | 79 | 6 | WC | A de Minaur | 6 | 6 | ||||||||||||||||||||
| 4 | M Raonic | 4 | 4 | ||||||||||||||||||||||||
| WC | A de Minaur | 6 | 65 | 4 | |||||||||||||||||||||||
| 7 | D Džumhur | 77 | 3 | 2 | R Harrison | 4 | 77 | 6 | |||||||||||||||||||
 D Istomin | 64 | 6 | 6 | D Istomin | 77 | 6 | |||||||||||||||||||||
| J Donaldson | 6 | 6 | J Donaldson | 65 | 2 | ||||||||||||||||||||||
| WC | J Thompson | 2 | 4 | D Istomin | 66 | 2r | |||||||||||||||||||||
| R Harrison | 6 | 3 | 6 | R Harrison | 78 | 4 | |||||||||||||||||||||
| L Mayer | 4 | 6 | 2 | R Harrison | 65 | 6 | 6 | ||||||||||||||||||||
| LL | Y Hanfmann | 77 | 4 | 2 | |||||||||||||||||||||||
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)| First round | Qualifying competition | ||||||||||||
| 1 | Alexander Bublik | 4 | 4 | ||||||||||
| Alt | John-Patrick Smith | 6 | 6 | ||||||||||
| Alt | John-Patrick Smith | 6 | 3 | 77 | |||||||||
 Viktor Galović | 4 | 6 | 62 | ||||||||||
| Viktor Galović | 4 | 6 | 6 | ||||||||||
| 7 | Renzo Olivo | 6 | 3 | 2 | |||||||||
| First round | Qualifying competition | ||||||||||||
| 2 | Yannick Hanfmann | 6 | 79 | ||||||||||
| WC | Sam Groth | 4 | 67 | ||||||||||
| 2 | Yannick Hanfmann | 1 | 6 | 3 | |||||||||
| 5 | Peter Polansky | 6 | 3 | 6 | |||||||||
| Filip Peliwo | 2 | 2 | |||||||||||
| 5 | Peter Polansky | 6 | 6 | ||||||||||
| First round | Qualifying competition | ||||||||||||
| 3 | Ernesto Escobedo | 6 | 4 | 6 | |||||||||
| WC | James Duckworth | 2 | 6 | 4 | |||||||||
| 3 | Ernesto Escobedo | 6 | 77 | ||||||||||
| 8 | Jozef Kovalík | 2 | 64 | ||||||||||
| Denis Kudla | 65 | 4 | |||||||||||
| 8 | Jozef Kovalík | 77 | 6 | ||||||||||
| First round | Qualifying competition | ||||||||||||
| 4 | Quentin Halys | 4 | 4 | ||||||||||
| Michael Mmoh | 6 | 6 | |||||||||||
| Michael Mmoh | 6 | 6 | |||||||||||
| 6 | Sebastian Ofner | 4 | 3 | ||||||||||
 Marcelo Arévalo | 6 | 63 | 2 | ||||||||||
| 6 | Sebastian Ofner | 2 | 77 | 6 | |||||||||
Two-time defending champion Novak Djokovic defeated Milos Raonic in the final, 6–2, 6–0 to win the men's singles tennis title at the 2016 Indian Wells Masters. It was his record-equaling fifth Indian Wells title.
Kei Nishikori was the defending champion, but chose not to participate this year.
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Grigor Dimitrov defeated Kei Nishikori in the final, 6–2, 2–6, 6–3 to win the men's singles tennis title at the 2017 Brisbane International.
Roger Federer defeated Stan Wawrinka in the final, 6–4, 7–5 to win the men's singles tennis title at the 2017 Indian Wells Masters. It was his record-equaling fifth Indian Wells title, 25th ATP Tour Masters 1000 singles title, and 90th singles title overall. He did not lose a single set in the entire tournament.
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Grigor Dimitrov defeated Nick Kyrgios in the final, 6–3, 7–5 to win the men's singles tennis title at the 2017 Cincinnati Masters. It was his first Masters 1000 title, and he did not lose a set en route.
The 2018 Brisbane International was a tournament on the 2018 ATP World Tour and 2018 WTA Tour. It was played on outdoor hard courts in Brisbane, Queensland, Australia. It was the tenth edition of the tournament and took place at the Queensland Tennis Centre in Tennyson. It was held from 31 December 2017 to 7 January 2018 as part of the Australian Open Series in preparation for the first Grand Slam of the year. Rafael Nadal and Andy Murray were about to start their 2018 seasons at the tournament, but both withdrew due to continuous injuries. On 5 October 2017, defending champions Grigor Dimitrov and Karolína Plíšková announced they would also compete.
Rafael Nadal defeated Nick Kyrgios in the final, 6–2, 6–1 to win the men's singles tennis title at the 2017 China Open. Nadal saved two match points en route to the title, in his first-round match against Lucas Pouille.
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This article displays the qualifying draw for men's singles at the 2018 Australian Open.
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Nick Kyrgios was the defending champion, but retired from his first round match against Ugo Humbert due to a wrist injury.