# 2013 US Open – Boys' singles

Filip Peliwo was the champion the previous year, but could not defend his title as he was no longer eligible to compete in junior tennis. Borna Ćorić won the title, defeating Thanasi Kokkinakis in the final, 3–6, 6–3, 6–1.

## Seeds

* Alexander Zverev (semifinals)
* Gianluigi Quinzi (quarterfinals)
* Christian Garín (semifinals)
* Borna Ćorić (champion)
* Stefan Kozlov (first round)
* Johan-Sébastien Tatlot (quarterfinals)
* Guillermo Núñez (first round)
* Yoshihito Nishioka (third round)
* Chung Hyeon (first round)
* Daniil Medvedev (third round)
* Nicolás Jarry (second round)
* Karen Khachanov (second round)
* Clément Geens (third round)
* Roman Safiullin (second round)
* Jorge Brian Panta (third round)
* Cameron Norrie (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 | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final | Final |
| 1 | Alexander Zverev | 6 | 6 | | | | | | | | | | | |
| WC | Collin Altamirano | 4 | 4 | | | | | | | | | | | |
| WC | Collin Altamirano | 4 | 4 | | 1 | Alexander Zverev | 6 | 3 | 0 | | | | | |
| | | | | | 4 | Borna Ćorić | 4 | 6 | 6 | | | | | |
| 4 | Borna Ćorić | 6 | 6 | | 4 | Borna Ćorić | 4 | 6 | 6 | | | | | |
| | Quentin Halys | 3 | 1 | | | | | | | | | | | |
| | Quentin Halys | 3 | 1 | | | | | | | 4 | Borna Ćorić | 3 | 6 | 6 |
| | | | | | | | | | | | Thanasi Kokkinakis | 6 | 3 | 1 |
| 6 | Johan-Sébastien Tatlot | 4 | 6$^7$ | | | | | | | | | | | | Thanasi Kokkinakis | 6 | 3 | 1 |
| 3 | Christian Garín | 6 | 7$^9$ | | | | | | | | | | | |
| 3 | Christian Garín | 6 | 7$^9$ | | 3 | Christian Garín | 6 | 3 | 4 | | | | | |
| | | | | | | Thanasi Kokkinakis | 4 | 6 | 6 | | | | | |
| | Thanasi Kokkinakis | 3 | 6 | 6 | | Thanasi Kokkinakis | 4 | 6 | 6 | | | | | |
| 2 | Gianluigi Quinzi | 6 | 2 | 2 | | | | | | | | | | |

### 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 |
| 1 | Alexander Zverev | 6 | 7$^7$ | | | | | | | | | | | | | | | |
| Q | Taylor Harry Fritz | 3 | 6$^2$ | | 1 | A Zverev | 6 | 5 | 6 | | | | | | | | | |
| | Bradley Mousley | 4 | 2 | | LL | G López Villaseñor | 1 | 7 | 3 | | | | | | | | | |
| LL | Gerardo López Villaseñor | 6 | 6 | | | | | | | 1 | A Zverev | 6 | 6 | | | | | |
| | Martin Redlicki | 6 | 6 | | | | | | | | M Redlicki | 4 | 3 | | | | | |
| | Matej Maruščák | 3 | 4 | | | M Redlicki | 6 | 6 | | | | | | | | | | |
| | Ken Onishi | 6 | 7 | | | K Onishi | 2 | 3 | | | | | | | | | | |
| 16 | Cameron Norrie | 4 | 5 | | | | | | | | | | | | 1 | A Zverev | 6 | 6 |
| 12 | Karen Khachanov | 6 | 5 | 6 | | | | | | | | | | | WC | C Altamirano | 4 | 4 |
| | Simon Friis Søndergaard | 4 | 7 | 0 | 12 | K Khachanov | 4 | 4 | | | | | | | | | | |
| WC | Collin Altamirano | 7$^7$ | 6 | | WC | C Altamirano | 6 | 6 | | | | | | | | | | |
| | Lee Duck-hee | 6$^4$ | 1 | | | | | | | WC | C Altamirano | 3 | 6 | 6 | | | | |
| | Maxime Janvier | 6 | 6 | | | | | | | WC | M McDonald | 6 | 4 | 3 | | | | |
| Q | Gabriel Vellinho Hocevar | 1 | 2 | | | M Janvier | 2 | 2 | | | | | | | | | | |
| WC | Mackenzie McDonald | 3 | 7$^7$ | 6 | WC | M McDonald | 6 | 6 | | | | | | | | | | |
| 7 | Guillermo Núñez | 6 | 6$^5$ | 3 | | | | | | | | | | | | | | |

#### 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 | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals |
| 4 | Borna Ćorić | 6 | 6 | | | | | | | | | | | | | | |
| WC | Tommy Paul | 1 | 2 | | 4 | B Ćorić | 6 | 6 | | | | | | | | | |
| | Jaime Galleguillos | 4 | 3 | | | W Zheng | 0 | 0 | | | | | | | | | |
| | Zheng Weiqiang | 6 | 6 | | | | | | | 4 | B Ćorić | 6 | 6 | | | | |
| | Johannes Härteis | 6 | 6 | | | | | | | 15 | J Panta | 4 | 2 | | | | |
| Q | Alex Rybakov | 4 | 2 | | | J Härteis | 6$^2$ | 3 | | | | | | | | | |
| Q | Thomas Colautti | 6$^6$ | 0 | | 15 | J Panta | 7$^7$ | 6 | | | | | | | | | |
| 15 | Jorge Brian Panta | 7$^8$ | 6 | | | | | | | | | | | 4 | B Ćorić | 6 | 6 |
| 9 | Chung Hyeon | 4 | 4 | | | | | | | | | | | | Q Halys | 3 | 1 |
| | Andrey Rublev | 6 | 6 | | | A Rublev | 4 | 6 | 1 | | | | | | | | |
| | Quentin Halys | 6 | 6 | | | Q Halys | 6 | 4 | 6 | | | | | | | | |
| Q | Frances Tiafoe | 0 | 2 | | | | | | | | Q Halys | 6 | 6 | | | | |
| | Rafael Matos | 6 | 6 | | | | | | | 8 | Y Nishioka | 2 | 0 | | | | |
| Q | Reilly Opelka | 4 | 4 | | | R Matos | 3 | 2 | | | | | | | | | |
| | Kamil Majchrzak | 6 | 5 | 1 | 8 | Y Nishioka | 6 | 6 | | | | | | | | | |
| 8 | Yoshihito Nishioka | 1 | 7 | 6 | | | | | | | | | | | | | |

### 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 | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals |
| 6 | Johan-Sébastien Tatlot | 6 | 6 | | | | | | | | | | | | | | |
| WC | JC Aragone | 3 | 1 | | 6 | J-S Tatlot | 1 | 6 | 6 | | | | | | | | |
| | Maximilian Marterer | 6 | 1 | 4 | | T Saito | 6 | 3 | 2 | | | | | | | | |
| | Takashi Saito | 4 | 6 | 6 | | | | | | 6 | J-S Tatlot | 7$^9$ | 6 | | | | |
| | Frederico Ferreira Silva | 3 | 6 | 6 | | | | | | 10 | D Medvedev | 6$^7$ | 3 | | | | |
| | Luca Corinteli | 6 | 1 | 2 | | F Silva | 4 | 4 | | | | | | | | | |
| | Luke Bambridge | 4 | 2 | | 10 | D Medvedev | 6 | 6 | | | | | | | | | |
| 10 | Daniil Medvedev | 6 | 6 | | | | | | | | | | | 6 | J-S Tatlot | 4 | 6$^7$ |
| 13 | Clément Geens | 2 | 7$^9$ | 6 | | | | | | | | | | 3 | C Garín | 6 | 7$^9$ |
| | Hong Seong-chan | 6 | 6$^7$ | 4 | 13 | C Geens | 6 | 6 | | | | | | | | | |
| | Harry Bourchier | 1 | 3 | | WC | D Kerznerman | 4 | 0 | | | | | | | | | |
| WC | Daniel Kerznerman | 6 | 6 | | | | | | | 13 | C Geens | 2 | 3 | | | | |
| | Marcelo Zormann | 3 | 5 | | | | | | | 3 | C Garín | 6 | 6 | | | | |
| | Elias Ymer | 6 | 7 | | | E Ymer | 3 | 6 | 2 | | | | | | | | |
| WC | Jared Donaldson | 6$^4$ | 6 | 0 | 3 | C Garín | 6 | 3 | 6 | | | | | | | | |
| 3 | Christian Garín | 7$^7$ | 4 | 6 | | | | | | | | | | | | | |

#### Section 4

| 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 | Third round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals |
| 5 | Stefan Kozlov | 1 | 2 | | | | | | | | | | | | | | | |
| | Lucas Miedler | 6 | 6 | | | L Miedler | 6 | 6 | | | | | | | | | | |
| | Jonny O'Mara | 2 | 6 | 3 | | Y-s Kim | 1 | 4 | | | | | | | | | | |
| | Kim Young-seok | 6 | 1 | 6 | | | | | | L Miedler | 2 | 7$^8$ | 2 | | | | | |
| | Thanasi Kokkinakis | 6 | 6 | | | | | | | T Kokkinakis | 6 | 6$^6$ | 6 | | | | | |
| | Naoki Nakagawa | 3 | 3 | | | T Kokkinakis | 6 | 6 | | | | | | | | | | |
| WC | Ernesto Escobedo | 5 | 3 | | 11 | N Jarry | 3 | 2 | | | | | | | | | | |
| 11 | Nicolás Jarry | 7 | 6 | | | | | | | | | | | | T Kokkinakis | 3 | 6 | 6 |
| 14 | Roman Safiullin | 6 | 6 | | | | | | | | | | | 2 | G Quinzi | 6 | 2 | 2 |
| Q | Alexandre Muller | 1 | 3 | | 14 | R Safiullin | 5 | 6$^r$ | | | | | | | | | | |
| | Cem İlkel | 2 | 6 | 4 | WC | G Brymer | 7 | 5 | | | | | | | | | | |
| WC | Gage Brymer | 6 | 4 | 6 | | | | | WC | G Brymer | 2 | 3 | | | | | | |
| | Noah Rubin | 6 | 6 | | | | | | 2 | G Quinzi | 6 | 6 | | | | | | |
| | Hannes Wagner | 3 | 0 | | | N Rubin | 3 | 4 | | | | | | | | | | |
| Q | Yusuke Takahashi | 2 | 4 | | 2 | G Quinzi | 6 | 6 | | | | | | | | | | |
| 2 | Gianluigi Quinzi | 6 | 6 | | | | | | | | | | | | | | | |