# 2018 US Open – Boys' singles

Wu Yibing was the defending champion, but was no longer eligible to participate in junior tournaments.
Thiago Seyboth Wild won the title, defeating Lorenzo Musetti in the final, 6–1, 2–6, 6–2.

## Seeds

* Tseng Chun-hsin (semifinals)
* Sebastián Báez (second round)
* Hugo Gaston (third round)
* Nicolás Mejía (third round)
* Timofei Skatov (second round)
* Thiago Seyboth Wild (champion)
* Adrian Andreev (first round, retired)
* Naoki Tajima (first round)
* Gilbert Soares Klier Júnior (first round)
* Facundo Díaz Acosta (first round)
* Tristan Boyer (first round)
* Mu Tao (first round)
* Filip Cristian Jianu (first round)
* Brandon Nakashima (quarterfinals)
* Carlos López Montagud (first round)
* Yankı Erel (first round)

## Main 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 | Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final | Final |
| 1 | Tseng Chun-hsin | 7$^7$ | 6 | | | | | | | | | |
| Q | Giulio Zeppieri | 6$^0$ | 2 | | | | | | | | | |
| Q | Giulio Zeppieri | 6$^0$ | 2 | 1 | Tseng Chun-hsin | 2 | 4 | | | | | |
| | | | | 6 | Thiago Seyboth Wild | 6 | 6 | | | | | |
| SE | Taisei Ichikawa | 6$^3$ | 4 | 6 | Thiago Seyboth Wild | 6 | 6 | | | | | |
| 6 | Thiago Seyboth Wild | 7$^7$ | 6 | | | | | | | | | |
| 6 | Thiago Seyboth Wild | 7$^7$ | 6 | | | | | 6 | Thiago Seyboth Wild | 6 | 2 | 6 |
| | | | | | | | | | Lorenzo Musetti | 1 | 6 | 2 |
| WC | Jenson Brooksby | 6 | 7 | | | | | | | | | | Lorenzo Musetti | 1 | 6 | 2 |
| 14 | Brandon Nakashima | 4 | 5 | | | | | | | | | |
| 14 | Brandon Nakashima | 4 | 5 | WC | Jenson Brooksby | 3 | 3 | | | | | |
| | | | | | Lorenzo Musetti | 6 | 6 | | | | | |
| | Lorenzo Musetti | 6 | 6 | | Lorenzo Musetti | 6 | 6 | | | | | |
| | Daniel Michalski | 4 | 0 | | | | | | | | | |

### 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 | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals |
| 1 | Tseng Chun-hsin | 6 | 6 | | | | | | | | | | | | | | |
| WC | Toby Alex Kodat | 2 | 0 | | 1 | C-h Tseng | 5 | 6 | 6 | | | | | | | | |
| | Nicolás Álvarez Varona | 4 | 4 | | | P Henning | 7 | 1 | 0 | | | | | | | | |
| | Philip Henning | 6 | 6 | | | | | | | 1 | C-h Tseng | 6 | 6 | | | | |
| | Ondřej Štyler | 4 | 4 | | | | | | | Q | W Marek | 2 | 3 | | | | |
| SE | Emilio Nava | 6 | 6 | | SE | E Nava | 3 | 5 | | | | | | | | | |
| Q | Wojciech Marek | 6 | 7$^7$ | | Q | W Marek | 6 | 7 | | | | | | | | | |
| 13 | Filip Cristian Jianu | 0 | 6$^5$ | | | | | | | | | | | 1 | C-h Tseng | 7$^7$ | 6 |
| 10 | Facundo Díaz Acosta | 6$^4$ | 6 | 5 | | | | | | | | | | Q | G Zeppieri | 6$^0$ | 2 |
| Q | Mateus Alves | 7$^7$ | 4 | 7 | Q | M Alves | 4 | 5 | | | | | | | | | |
| | Nick Hardt | 6 | 7$^{10}$ | | | N Hardt | 6 | 7 | | | | | | | | | |
| WC | Govind Nanda | 4 | 6$^8$ | | | | | | | | N Hardt | 4 | 1 | | | | |
| Q | Giulio Zeppieri | 6 | 6 | | | | | | | Q | G Zeppieri | 6 | 6 | | | | |
| | Harold Mayot | 2 | 0 | | Q | G Zeppieri | 6 | 6 | | | | | | | | | |
| WC | Martin Damm | 2 | 4 | | 5 | T Skatov | 0 | 1 | | | | | | | | | |
| 5 | Timofei Skatov | 6 | 6 | | | | | | | | | | | | | | |

#### Section 2

| 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 |
| 4 | Nicolás Mejía | 7$^7$ | 6 | | | | | | | | | | | | | | | |
| Q | Eliot Spizzirri | 6$^2$ | 2 | | 4 | N Mejía | 6 | 6 | | | | | | | | | | |
| | Clément Tabur | 6 | 5 | 2 | WC | K Mayo | 3 | 3 | | | | | | | | | | |
| WC | Keenan Mayo | 4 | 7 | 6 | | | | | | 4 | N Mejía | 6 | 5 | 4 | | | | |
| | Andrew Fenty | 6 | 2 | 3 | | | | | | SE | T Ichikawa | 3 | 7 | 6 | | | | |
| SE | Taisei Ichikawa | 4 | 6 | 6 | SE | T Ichikawa | 6$^2$ | 7$^7$ | 6 | | | | | | | | | |
| | Thiago Agustín Tirante | 7 | 1 | 6 | | TA Tirante | 7$^7$ | 6$^0$ | 2 | | | | | | | | | |
| 16 | Yankı Erel | 5 | 6 | 3 | | | | | | | | | | | SE | T Ichikawa | 6$^3$ | 4 |
| 11 | Tristan Boyer | 1 | 5 | | | | | | | | | | | | 6 | T Seyboth Wild | 7$^7$ | 6 |
| | Jesper de Jong | 6 | 7 | | | J de Jong | 4 | 1 | | | | | | | | | | |
| | Aidan McHugh | 7$^7$ | 6 | | | A McHugh | 6 | 6 | | | | | | | | | | |
| Q | Cristian Crețu | 6$^2$ | 3 | | | | | | | | A McHugh | 4 | 1 | | | | | |
| | Jiří Lehečka | 7$^8$ | 7 | | | | | | | 6 | T Seyboth Wild | 6 | 6 | | | | | |
| | Rinky Hijikata | 6$^6$ | 5 | | | J Lehečka | 4 | 2 | | | | | | | | | | |
| WC | Zane Khan | 7$^9$ | 1 | 3 | 6 | T Seyboth Wild | 6 | 6 | | | | | | | | | | |
| 6 | Thiago Seyboth Wild | 6$^7$ | 6 | 6 | | | | | | | | | | | | | | |

### Bottom half
#### Section 3

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Third round | Third round | Third round | Third round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals |
| 8 | Naoki Tajima | 1 | 3 | | | | | | | | | | | | | |
| | Jonáš Forejtek | 6 | 6 | | | J Forejtek | 1 | 2 | | | | | | | | |
| Q | Valentin Royer | 6 | 2 | 2 | WC | J Brooksby | 6 | 6 | | | | | | | | |
| WC | Jenson Brooksby | 4 | 6 | 6 | | | | | WC | J Brooksby | 7 | 6 | | | | |
| Q | Henry von der Schulenburg | 6 | 4 | | | | | | Q | H von der Schulenburg | 5 | 2 | | | | |
| | Deney Wassermann | 3 | 3$^r$ | | Q | H von der Schulenburg | 6 | 6 | | | | | | | | |
| | Trey Hilderbrand | 7$^7$ | 2 | 6 | | T Hilderbrand | 4 | 4 | | | | | | | | |
| 12 | Mu Tao | 6$^5$ | 6 | 2 | | | | | | | | | WC | J Brooksby | 6 | 7 |
| 14 | Brandon Nakashima | 7$^7$ | 6 | | | | | | | | | | 14 | B Nakashima | 4 | 5 |
| LL | Henri Squire | 6$^4$ | 4 | | 14 | B Nakashima | 6 | 6 | | | | | | | | |
| | Anton Matusevich | 7 | 5 | 5 | | O Virtanen | 3 | 4 | | | | | | | | |
| | Otto Virtanen | 5 | 7 | 7 | | | | | 14 | B Nakashima | 6 | 6 | | | | |
| | Juan Manuel Cerúndolo | 6 | 6 | | | | | | 3 | H Gaston | 1 | 2 | | | | |
| | Damien Wenger | 2 | 3 | | | JM Cerúndolo | 2 | 1 | | | | | | | | |
| WC | Neel Rajesh | 1 | 3 | | 3 | H Gaston | 6 | 6 | | | | | | | | |
| 3 | Hugo Gaston | 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 |
| 7 | Adrian Andreev | 3 | 2$^r$ | | | | | | | | | | | | | |
| | Arthur Cazaux | 6 | 4 | | | A Cazaux | 0 | 6 | 3 | | | | | | | |
| | Lorenzo Musetti | 6 | 6 | | | L Musetti | 6 | 3 | 6 | | | | | | | |
| WC | Stefan Dostanic | 4 | 0 | | | | | | | L Musetti | 3 | 6 | 6 | | | |
| | Arnaud Bovy | 6 | 7 | | | | | | | C Kingsley | 6 | 3 | 0 | | | |
| Q | Axel Nefve | 4 | 5 | | | A Bovy | 1 | 7$^8$ | 4 | | | | | | | |
| | Cannon Kingsley | 6 | 6 | | | C Kingsley | 6 | 6$^6$ | 6 | | | | | | | |
| 9 | Gilbert Soares Klier Júnior | 2 | 3 | | | | | | | | | | | L Musetti | 6 | 6 |
| 15 | Carlos López Montagud | 2 | 4 | | | | | | | | | | | D Michalski | 4 | 0 |
| | Antoine Cornut-Chauvinc | 6 | 6 | | | A Cornut-Chauvinc | 6 | 7 | | | | | | | | |
| | Dalibor Svrčina | 6 | 3 | 6 | | D Svrčina | 4 | 5 | | | | | | | | |
| | Tyler Zink | 3 | 6 | 2 | | | | | | A Cornut-Chauvinc | 6 | 2 | 4 | | | |
| | Daniel Michalski | 1 | 6 | 7$^7$ | | | | | | D Michalski | 3 | 6 | 6 | | | |
| | Drew Baird | 6 | 2 | 6$^5$ | | D Michalski | 6 | 6 | | | | | | | | |
| | Dostanbek Tashbulatov | 3 | 5 | | 2 | S Báez | 4 | 4 | | | | | | | | |
| 2 | Sebastián Báez | 6 | 7 | | | | | | | | | | | | | |

## Qualifying
### Seeds

* Valentin Royer (qualified)
* Mateus Alves (qualified)
* Wojciech Marek (qualified)
* Alejo Lorenzo Lingua Lavallén (qualifying competition)
* Giulio Zeppieri (qualified)
* Admir Kalender (first round)
* Sergey Fomin (first round)
* Jacob Fearnley (qualifying competition)
* Henry von der Schulenburg (qualified)
* Matteo Arnaldi (first round)
* Cezar Crețu (qualified)
* Justin Schlageter (first round)
* Davide Tortora (first round)
* Henri Squire (qualifying competition, lucky loser)
* Eliot Spizzirri (qualified)
* Siddhant Banthia (first round)

### Qualifiers

* Valentin Royer
* Mateus Alves
* Wojciech Marek
* Henry von der Schulenburg
* Giulio Zeppieri
* Eliot Spizzirri
* Axel Nefve
* Cezar Crețu

### Lucky loser

* Henry Squire

### Draw
#### First qualifier

| First round | First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 1 | Valentin Royer | 7$^7$ | 6 | | | | | |
| | Daniil Glinka | 6$^5$ | 2 | | | | | |
| | Daniil Glinka | 6$^5$ | 2 | | 1 | Valentin Royer | 6 | 6 |
| | | | | | WC | Alexander Bernard | 4 | 2 |
| WC | Alexander Bernard | 1 | 6 | 6 | WC | Alexander Bernard | 4 | 2 |
| 10 | Matteo Arnaldi | 6 | 3 | 4 | | | | |

#### Second qualifier

| First round | First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 2 | Mateus Alves | 3 | 7$^7$ | 6 | | | | |
| | Filippo Moroni | 6 | 6$^3$ | 4 | | | | |
| | Filippo Moroni | 6 | 6$^3$ | 4 | 2 | Mateus Alves | 6 | 6 |
| | | | | | 14 | Henri Squire | 3 | 4 |
| WC | Eric Hahn | 5 | 2 | | 14 | Henri Squire | 3 | 4 |
| 14 | Henri Squire | 7 | 6 | | | | | |

#### Third qualifier

| First round | First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 3 | Wojciech Marek | 3 | 7 | 6 | | | | |
| | Vikash Singh | 6 | 5 | 3 | | | | |
| | Vikash Singh | 6 | 5 | 3 | 3 | Wojciech Marek | 6 | 6 |
| | | | | | WC | Alexander Lee | 3 | 4 |
| WC | Alexander Lee | 6 | 7 | | WC | Alexander Lee | 3 | 4 |
| 13 | Davide Tortora | 1 | 5 | | | | | |

#### Fourth qualifier

| First round | First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 4 | Alejo Lorenzo Lingua Lavallén | 6 | 7 | | | | | |
| | Ronan Jachuck | 4 | 5 | | | | | |
| | Ronan Jachuck | 4 | 5 | | 4 | Alejo Lorenzo Lingua Lavallén | 0 | 4 |
| | | | | | 9 | Henry von der Schulenburg | 6 | 6 |
| | Harry Wendelken | 3 | 6 | 3 | 9 | Henry von der Schulenburg | 6 | 6 |
| 9 | Henry von der Schulenburg | 6 | 2 | 6 | | | | |

#### Fifth qualifier

| First round | First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 5 | Giulio Zeppieri | 6 | 6 | | | | | |
| WC | Niroop Vallabhaneni | 1 | 1 | | | | | |
| WC | Niroop Vallabhaneni | 1 | 1 | | 5 | Giulio Zeppieri | 6 | 6 |
| | | | | | | Filip Kolasiński | 1 | 0 |
| | Filip Kolasiński | 6 | 6$^2$ | 7 | | Filip Kolasiński | 1 | 0 |
| 12 | Justin Schlageter | 4 | 7$^7$ | 5 | | | | |

#### Sixth qualifier

| First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 6 | Admir Kalender | 6$^5$ | 5 | | | | | |
| | Igor Gimenez | 7$^7$ | 7 | | | | | |
| | Igor Gimenez | 7$^7$ | 7 | | Igor Gimenez | 3 | 6 | 3 |
| | | | | 15 | Eliot Spizzirri | 6 | 3 | 6 |
| WC | Hikaru Shiraishi | 6$^2$ | 4 | 15 | Eliot Spizzirri | 6 | 3 | 6 |
| 15 | Eliot Spizzirri | 7$^7$ | 6 | | | | | |

#### Seventh qualifier

| First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 7 | Sergey Fomin | 6$^9$ | 6$^4$ | | | | |
| | Erik Grevelius | 7$^{11}$ | 7$^7$ | | | | |
| | Erik Grevelius | 7$^{11}$ | 7$^7$ | | Erik Grevelius | 3 | 2 |
| | | | | WC | Axel Nefve | 6 | 6 |
| WC | Axel Nefve | 6 | 6 | WC | Axel Nefve | 6 | 6 |
| 16 | Siddhant Banthia | 3 | 3 | | | | |

#### Eighth qualifier

| First round | First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 8 | Jacob Fearnley | 1 | 6 | 6 | | | | |
| | Francesco Passaro | 6 | 3 | 2 | | | | |
| | Francesco Passaro | 6 | 3 | 2 | 8 | Jacob Fearnley | 4 | 5 |
| | | | | | 11 | Cezar Crețu | 6 | 7 |
| | Arthur Craig Pantino | 4 | 3 | | 11 | Cezar Crețu | 6 | 7 |
| 11 | Cezar Crețu | 6 | 6 | | | | | |