# 2018 Australian Open – Boys' singles

Sebastian Korda, the son of 1998 men's singles champion Petr Korda, won the boys' singles tennis title at the 2018 Australian Open, defeating Tseng Chun-hsin in the final, 7–6$^{(8–6)}$, 6–4.
Zsombor Piros was the defending champion, but was no longer eligible to participate in junior events. He received a wildcard into the men's singles qualifying competition, where he lost to Bjorn Fratangelo in the second round.

## Seeds

* Timofey Skatov (quarterfinals)
* Marko Miladinović (semifinals)
* Sebastián Báez (second round)
* Park Ui-sung (first round)
* Hugo Gaston (quarterfinals)
* Tseng Chun-hsin (final)
* Sebastian Korda (champion)
* Nicolás Mejía (first round)
* Thiago Seyboth Wild (second round)
* Juan Manuel Cerúndolo (first round)
* Thiago Agustín Tirante (first round)
* Alexey Zakharov (third round, retired)
* Andrew Fenty (first round)
* Ondřej Štyler (third round)
* Naoki Tajima (first round)
* Tomáš Macháč (first 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

| Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final |
| 1 | Timofey Skatov | 6 | 3 | 2 | | | | | | | | | |
| 6 | Tseng Chun-hsin | 2 | 6 | 6 | | | | | | | | | |
| 6 | Tseng Chun-hsin | 2 | 6 | 6 | 6 | Tseng Chun-hsin | 6 | 5 | 6 | | | | |
| | | | | | | Aidan McHugh | 3 | 7 | 4 | | | | |
| | Aidan McHugh | 6 | 6 | | | Aidan McHugh | 3 | 7 | 4 | | | | |
| WC | Rinky Hijikata | 4 | 2 | | | | | | | | | | |
| WC | Rinky Hijikata | 4 | 2 | | | | | | | 6 | Tseng Chun-hsin | 6$^6$ | 4 |
| | | | | | | | | | | 7 | Sebastian Korda | 7$^8$ | 6 |
| 7 | Sebastian Korda | 6 | 6 | | | | | | | | | | | 7 | Sebastian Korda | 7$^8$ | 6 |
| | Ray Ho | 2 | 3 | | | | | | | | | | |
| | Ray Ho | 2 | 3 | | 7 | Sebastian Korda | 7 | 5 | 6 | | | | |
| | | | | | 2 | Marko Miladinović | 5 | 7 | 4 | | | | |
| 5 | Hugo Gaston | 6 | 3 | 5 | 2 | Marko Miladinović | 5 | 7 | 4 | | | | |
| 2 | Marko Miladinović | 4 | 6 | 7 | | | | | | | | | |

### Top half
#### Section 1

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Third round | Third round | Third round | Third round | Third round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals |
| 1 | Timofey Skatov | 6 | 6 | | | | | | | | | | | | | | | | |
| | Mo Yecong | 2 | 3 | | 1 | T Skatov | 6 | 6 | | | | | | | | | | | |
| | Titouan Droguet | 6 | 2 | 3 | WC | S Storch | 1 | 2 | | | | | | | | | | | |
| WC | Stefan Storch | 3 | 6 | 6 | | | | | | 1 | T Skatov | 0 | 7 | 6 | | | | | |
| | Jack Draper | 3 | 4 | | | | | | | | Y Erel | 6 | 5 | 3 | | | | | |
| | Dalibor Svrčina | 6 | 6 | | | D Svrčina | 2 | 0 | | | | | | | | | | | |
| | Yankı Erel | 7$^7$ | 2 | 6 | | Y Erel | 6 | 6 | | | | | | | | | | | |
| 13 | Andrew Fenty | 6$^2$ | 6 | 3 | | | | | | | | | | | 1 | T Skatov | 6 | 3 | 2 |
| 11 | Thiago Agustín Tirante | 6 | 6$^4$ | 0 | | | | | | | | | | | 6 | C-h Tseng | 2 | 6 | 6 |
| Q | Sergey Fomin | 4 | 7$^7$ | 6 | Q | S Fomin | 1 | 7 | 3 | | | | | | | | | | |
| LL | Lodewijk Weststrate | 6$^3$ | 1 | | | I Gimenez | 6 | 5 | 6 | | | | | | | | | | |
| | Igor Gimenez | 7$^7$ | 6 | | | | | | | | I Gimenez | 2 | 6$^5$ | | | | | | |
| | Taisei Ichikawa | 7 | 6$^6$ | 6 | | | | | | 6 | C-h Tseng | 6 | 7$^7$ | | | | | | |
| | Daniel Michalski | 5 | 7$^8$ | 3 | | T Ichikawa | 7$^7$ | 3 | 0 | | | | | | | | | | |
| Q | Duje Ajduković | 0 | 2 | | 6 | C-h Tseng | 6$^4$ | 6 | 6 | | | | | | | | | | |
| 6 | Tseng Chun-hsin | 6 | 6 | | | | | | | | | | | | | | | | |

#### Section 2

| First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Third round | Third round | Third round | Third round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals |
| 4 | Park Ui-sung | 6$^4$ | 4 | | | | | | | | | | | | | |
| Q | Jaimee Floyd Angele | 7$^7$ | 6 | Q | JF Angele | 2 | 6 | 6$^5$ | | | | | | | | |
| | Aidan McHugh | 6 | 7$^7$ | | A McHugh | 6 | 3 | 7$^7$ | | | | | | | | |
| | Filip Cristian Jianu | 4 | 6$^3$ | | | | | | | A McHugh | 7$^7$ | 6 | | | | |
| WC | Alexander Crnokrak | 6 | 6 | | | | | | 14 | O Štyler | 6$^1$ | 3 | | | | |
| | Sangeet Sridhar | 3 | 1 | WC | A Crnokrak | 3 | 7$^7$ | 3 | | | | | | | | |
| Q | Giulio Zeppieri | 2 | 6$^6$ | 14 | O Štyler | 6 | 6$^3$ | 6 | | | | | | | | |
| 14 | Ondřej Štyler | 6 | 7$^8$ | | | | | | | | | | | A McHugh | 6 | 6 |
| 10 | Juan Manuel Cerúndolo | 2 | 2 | | | | | | | | | | WC | R Hijikata | 4 | 2 |
| | Drew Baird | 6 | 6 | | D Baird | 3 | 6 | 7$^8$ | | | | | | | | |
| Q | Jesper de Jong | 6 | 6 | Q | J de Jong | 6 | 4 | 6$^6$ | | | | | | | | |
| WC | Xiao Linang | 1 | 3 | | | | | | | D Baird | 4 | 3 | | | | |
| | Jonáš Forejtek | 5 | 1 | | | | | | WC | R Hijikata | 6 | 6 | | | | |
| WC | Rinky Hijikata | 7 | 6 | WC | R Hijikata | 4 | 6 | 6 | | | | | | | | |
| | Matheus Pucinelli de Almeida | 7 | 7$^9$ | | M Pucinelli de Almeida | 6 | 4 | 4 | | | | | | | | |
| 8 | Nicolás Mejía | 5 | 6$^7$ | | | | | | | | | | | | | |

### Bottom half
#### Section 3

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Third round | Third round | Third round | Third round | Third round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals |
| 7 | Sebastian Korda | 7 | 6 | | | | | | | | | | | | | | | |
| | Clément Tabur | 5 | 3 | | 7 | S Korda | 6 | 6 | | | | | | | | | | |
| WC | Ken Cavrak | 3 | 3 | | | A Andreev | 2 | 1 | | | | | | | | | | |
| | Adrian Andreev | 6 | 6 | | | | | | | 7 | S Korda | 4 | 6 | 6 | | | | |
| Q | Philip Henning | 7$^7$ | 7 | | | | | | | Q | P Henning | 6 | 1 | 4 | | | | |
| | George Loffhagen | 6$^5$ | 5 | | Q | P Henning | 6 | 6 | | | | | | | | | | |
| | Dane Sweeny | 5 | 5 | | 9 | T Seyboth Wild | 4 | 4 | | | | | | | | | | |
| 9 | Thiago Seyboth Wild | 7 | 7 | | | | | | | | | | | | 7 | S Korda | 6 | 6 |
| 15 | Naoki Tajima | 3 | 4 | | | | | | | | | | | | | R Ho | 2 | 3 |
| | Wojciech Marek | 6 | 6 | | | W Marek | 7 | 6 | | | | | | | | | | |
| | Christian Didier Chin | 3 | 6 | 7$^7$ | | CD Chin | 5 | 2 | | | | | | | | | | |
| | Thomas Bosancic | 6 | 0 | 6$^3$ | | | | | | | W Marek | 1 | 6 | 5 | | | | |
| | Andrew Paulson | 5 | 3 | | | | | | | | R Ho | 6 | 3 | 7 | | | | |
| | Ray Ho | 7 | 6 | | | R Ho | 6 | 3 | 6 | | | | | | | | | |
| | Admir Kalender | 7$^8$ | 3 | 3 | 3 | S Báez | 3 | 6 | 4 | | | | | | | | | |
| 3 | Sebastián Báez | 6$^6$ | 6 | 6 | | | | | | | | | | | | | | |

#### Section 4

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Third round | Third round | Third round | Third round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals |
| 5 | Hugo Gaston | 6 | 6 | | | | | | | | | | | | | | | |
| | Siddhant Banthia | 2 | 0 | | 5 | H Gaston | 6 | 7$^7$ | | | | | | | | | | |
| | Jeong Yeong-seok | 6 | 5$^r$ | | Q | J Lyeons | 3 | 6$^4$ | | | | | | | | | | |
| Q | Jaycer Lyeons | 3 | 5 | | | | | | | 5 | H Gaston | 7 | 1 | | | | | |
| | Nick Hardt | 6 | 6 | | | | | | | 12 | A Zakharov | 5 | 0$^r$ | | | | | |
| WC | Chen Dong | 3 | 3 | | | N Hardt | 3 | 4 | | | | | | | | | | |
| Q | Damien Wenger | 5 | 6 | 0 | 12 | A Zakharov | 6 | 6 | | | | | | | | | | |
| 12 | Alexey Zakharov | 7 | 4 | 6 | | | | | | | | | | 5 | H Gaston | 6 | 3 | 5 |
| 16 | Tomáš Macháč | 3 | 6$^5$ | | | | | | | | | | | 2 | M Miladinović | 4 | 6 | 7 |
| | Rudolf Molleker | 6 | 7$^7$ | | | R Molleker | 6$^3$ | 7$^{14}$ | 6 | | | | | | | | | |
| | Mu Tao | 6 | 6 | | | T Mu | 7$^7$ | 6$^{12}$ | 3 | | | | | | | | | |
| WC | Tristan Schoolkate | 4 | 2 | | | | | | | | R Molleker | 3 | 4 | | | | | |
| | Tristan Boyer | 6 | 6 | | | | | | | 2 | M Miladinović | 6 | 6 | | | | | |
| | Lorenzo Musetti | 3 | 1 | | | T Boyer | 6 | 1 | 4 | | | | | | | | | |
| | João Lucas Reis da Silva | 3 | 7$^{11}$ | 3 | 2 | M Miladinović | 2 | 6 | 6 | | | | | | | | | |
| 2 | Marko Miladinović | 6 | 6$^9$ | 6 | | | | | | | | | | | | | | |

## Qualifying
### Seeds

* Damien Wenger (qualified)
* Jesper de Jong (qualified)
* Brian Shi (first round)
* Han Seon-yong (qualifying competition)
* Philip Henning (qualified)
* Oleksii Krutykh (qualifying competition)
* Duje Ajduković (qualified)
* Aaron Schmid (first round)
* Seita Watanabe (first round)
* Jaimee Floyd Angele (qualified)
* Giulio Zeppieri (qualified)
* Alberto Colás Sánchez (qualifying competition)
* Lodewijk Weststrate (qualifying competition; lucky loser)
* Sergey Fomin (qualified)
* Jaycer Lyeons (qualified)
* Emile Hudd (qualifying competition)

### Qualifiers

* Damien Wenger
* Jesper de Jong
* Jaimee Floyd Angele
* Sergey Fomin
* Philip Henning
* Giulio Zeppieri
* Duje Ajduković
* Jaycer Lyeons

### Lucky losers

* Lodewijk Weststrate

### Draw
#### First qualifier

| First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 1 | Damien Wenger | 6 | 6 | | | | |
| WC | Will Hann | 4 | 4 | | | | |
| WC | Will Hann | 4 | 4 | 1 | Damien Wenger | 7$^7$ | 7 |
| | | | | | Macsen Sisam | 6$^5$ | 5 |
| | Macsen Sisam | 6 | 6 | | Macsen Sisam | 6$^5$ | 5 |
| 9 | Seita Watanabe | 4 | 3 | | | | |

#### Second qualifier

| First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 2 | Jesper de Jong | 6 | 6 | | | | |
| | William Woodall | 2 | 3 | | | | |
| | William Woodall | 2 | 3 | 2 | Jesper de Jong | 6 | 6 |
| | | | | 16 | Emile Hudd | 0 | 4 |
| WC | Joshua Spaull | 0 | 4 | 16 | Emile Hudd | 0 | 4 |
| 16 | Emile Hudd | 6 | 6 | | | | |

#### Third qualifier

| First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 3 | Brian Shi | 3 | 3 | | | | |
| | Henri Squire | 6 | 6 | | | | |
| | Henri Squire | 6 | 6 | | Henri Squire | 1 | 2 |
| | | | | 10 | Jaimee Floyd Angele | 6 | 6 |
| WC | Tai Sach | 2 | 3 | 10 | Jaimee Floyd Angele | 6 | 6 |
| 10 | Jaimee Floyd Angele | 6 | 6 | | | | |

#### Fourth qualifier

| First round | First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 4 | Han Seon-yong | 6 | 6 | | | | | | |
| | Campbell Salmon | 4 | 2 | | | | | | |
| | Campbell Salmon | 4 | 2 | | 4 | Han Seon-yong | 1 | 6 | 3 |
| | | | | | 14 | Sergey Fomin | 6 | 3 | 6 |
| | Keisuke Saitoh | 4 | 6 | 3 | 14 | Sergey Fomin | 6 | 3 | 6 |
| 14 | Sergey Fomin | 6 | 4 | 6 | | | | | |

#### Fifth qualifier

| First round | First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 5 | Philip Henning | 7 | 6 | | | | | |
| WC | Jayden Court | 5 | 4 | | | | | |
| WC | Jayden Court | 5 | 4 | | 5 | Philip Henning | 6 | 6 |
| | | | | | 12 | Alberto Colás Sánchez | 4 | 3 |
| | Leopold Zima | 6 | 1 | 3 | 12 | Alberto Colás Sánchez | 4 | 3 |
| 12 | Alberto Colás Sánchez | 2 | 6 | 6 | | | | |

#### Sixth qualifier

| First round | First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 6 | Oleksii Krutykh | 6 | 4 | 7$^7$ | | | | |
| WC | Patrick Harper | 1 | 6 | 6$^5$ | | | | |
| WC | Patrick Harper | 1 | 6 | 6$^5$ | 6 | Oleksii Krutykh | 4 | 2 |
| | | | | | 11 | Giulio Zeppieri | 6 | 6 |
| | Ryuya Ata | 2 | 1 | | 11 | Giulio Zeppieri | 6 | 6 |
| 11 | Giulio Zeppieri | 6 | 6 | | | | | |

#### Seventh qualifier

| First round | First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 7 | Duje Ajduković | 2 | 6 | 6 | | | | |
| | Ng Ki-lung | 6 | 1 | 4 | | | | |
| | Ng Ki-lung | 6 | 1 | 4 | 7 | Duje Ajduković | 6 | 7 |
| | | | | | 13 | Lodewijk Weststrate | 3 | 5 |
| WC | Mason Naumovski | 3 | 1 | | 13 | Lodewijk Weststrate | 3 | 5 |
| 13 | Lodewijk Weststrate | 6 | 6 | | | | | |

#### Eighth qualifier

| First round | First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 8 | Aaron Schmid | 6 | 4 | 1 | | | | | |
| | Hikaru Shiraishi | 2 | 6 | 6 | | | | | |
| | Hikaru Shiraishi | 2 | 6 | 6 | | Hikaru Shiraishi | 7 | 5 | 0$^r$ |
| | | | | | 15 | Jaycer Lyeons | 5 | 7 | 3 |
| | Erik Grevelius | 6 | 1 | 1 | 15 | Jaycer Lyeons | 5 | 7 | 3 |
| 15 | Jaycer Lyeons | 3 | 6 | 6 | | | | | |