# 2003 US Open – Boys' singles

Richard Gasquet was the defending champion, but did not compete in the juniors that year.
Jo-Wilfried Tsonga won the tournament, defeating Marcos Baghdatis in the final, 7–6$^{(7–4)}$, 6–3.

## Seeds

* Marcos Baghdatis (final)
* Florin Mergea (semifinals)
* Brian Baker (quarterfinals)
* Dudi Sela (semifinals)
* Jo-Wilfried Tsonga (champion)
* Daniel Gimeno-Traver (third round)
* Mathieu Montcourt (quarterfinals)
* Chris Guccione (third round)
* Sebastian Rieschick (third round)
* Chris Kwon (first round)
* Bruno Rosa (second round)
* Andy Murray (quarterfinals)
* Fred Gil (third round)
* Luis-Manuel Flores (third round)
* Leonardo Kirche (second round)
* Suk Hyun-joon (second 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 | Final | Final | Final | Final |
| 1 | Marcos Baghdatis | 6 | 7$^7$ | | | | | | | | | |
| WC | Scoville Jenkins | 1 | 6$^4$ | | | | | | | | | |
| WC | Scoville Jenkins | 1 | 6$^4$ | | 1 | Marcos Baghdatis | 6 | 6 | | | | |
| | | | | | 4 | Dudi Sela | 2 | 1 | | | | |
| 4 | Dudi Sela | 6 | 3 | 6 | 4 | Dudi Sela | 2 | 1 | | | | |
| 7 | Mathieu Montcourt | 4 | 6 | 4 | | | | | | | | |
| 7 | Mathieu Montcourt | 4 | 6 | 4 | | | | | 1 | Marcos Baghdatis | 6$^4$ | 3 |
| | | | | | | | | | 5 | Jo-Wilfried Tsonga | 7$^7$ | 6 |
| 5 | Jo-Wilfried Tsonga | 6 | 7$^7$ | | | | | | | | | | 5 | Jo-Wilfried Tsonga | 7$^7$ | 6 |
| 3 | Brian Baker | 3 | 6$^2$ | | | | | | | | | |
| 3 | Brian Baker | 3 | 6$^2$ | | 5 | Jo-Wilfried Tsonga | 6 | 6 | | | | |
| | | | | | 2 | Florin Mergea | 4 | 4 | | | | |
| 12 | Andy Murray | 1 | 5 | | 2 | Florin Mergea | 4 | 4 | | | | |
| 2 | Florin Mergea | 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 |
| 1 | Marcos Baghdatis | 4 | 6 | 7$^7$ | | | | | | | | | | | | | | |
| | Adam Feeney | 6 | 3 | 6$^1$ | 1 | M Baghdatis | 6 | 6 | | | | | | | | | | |
| | Mischa Zverev | 6 | 6 | | | M Zverev | 1 | 2 | | | | | | | | | | |
| | Robert Cameron | 2 | 2 | | | | | | | 1 | M Baghdatis | 6 | 6 | | | | | |
| | Julien Gely | 1 | 6 | 6 | | | | | | 13 | F Gil | 4 | 0 | | | | | |
| | Jamie Baker | 6 | 4 | 2 | | J Gely | 3 | 6 | 4 | | | | | | | | | |
| | Somdev Devvarman | 7$^7$ | 6$^5$ | 5 | 13 | F Gil | 6 | 1 | 6 | | | | | | | | | |
| 13 | Fred Gil | 6$^2$ | 7$^7$ | 7 | | | | | | | | | | | 1 | M Baghdatis | 6 | 7$^7$ |
| 11 | Bruno Rosa | 6 | 6$^6$ | 6 | | | | | | | | | | | WC | S Jenkins | 1 | 6$^4$ |
| | Jaime Cuellar | 3 | 7$^8$ | 1 | 11 | B Rosa | 3 | 2 | | | | | | | | | | |
| Q | Konstantin Kravchuk | 4 | 6 | 2 | WC | S Jenkins | 6 | 6 | | | | | | | | | | |
| WC | Scoville Jenkins | 6 | 4 | 6 | | | | | | WC | S Jenkins | 4 | 6 | 7 | | | | |
| | Brendan Evans | 5 | 6 | 6 | | | | | | 6 | D Gimeno-Traver | 6 | 1 | 5 | | | | |
| | G.D. Jones | 7 | 3 | 4 | | B Evans | 6 | 4 | 3 | | | | | | | | | |
| Q | Ruben Gonzales | 4 | 4 | | 6 | D Gimeno-Traver | 3 | 6 | 6 | | | | | | | | | |
| 6 | Daniel Gimeno-Traver | 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 | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals |
| 4 | Dudi Sela | 6 | 6 | | | | | | | | | | | | | | | |
| LL | Eric Scherer | 3 | 3 | | 4 | D Sela | 6 | 6 | | | | | | | | | | |
| Q | Horacio Zeballos | 7$^7$ | 6 | | Q | H Zeballos | 1 | 2 | | | | | | | | | | |
| WC | Gary Sacks | 6$^4$ | 4 | | | | | | | 4 | D Sela | 6 | 6 | | | | | |
| | Robert Smeets | 6 | 7$^7$ | | | | | | | | R Smeets | 3 | 2 | | | | | |
| | Novak Djokovic | 4 | 6$^3$ | | | R Smeets | 6 | 6 | | | | | | | | | | |
| | Divij Sharan | 6 | 4 | 4 | 16 | H-j Suk | 1 | 1 | | | | | | | | | | |
| 16 | Suk Hyun-joon | 4 | 6 | 6 | | | | | | | | | | 4 | D Sela | 6 | 3 | 6 |
| 10 | Chris Kwon | 6$^2$ | 5$^r$ | | | | | | | | | | | 7 | M Montcourt | 4 | 6 | 4 |
| | Jerome Becker | 7$^7$ | 5 | | | J Becker | 6 | 6$^4$ | 4 | | | | | | | | | |
| | Fritz Wolmarans | 6 | 6 | | | F Wolmarans | 2 | 7$^7$ | 6 | | | | | | | | | |
| | Jose-Luis Muguruza | 2 | 1 | | | | | | | | F Wolmarans | 5 | 4 | | | | | |
| WC | Michael Shabaz | 1 | 4 | | | | | | | 7 | M Montcourt | 7 | 6 | | | | | |
| | Alex Kuznetsov | 6 | 6 | | | A Kuznetsov | 6 | 4 | 3 | | | | | | | | | |
| | Mehdi Ziadi | 2 | 4 | | 7 | M Montcourt | 3 | 6 | 6 | | | | | | | | | |
| 7 | Mathieu Montcourt | 6 | 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 | Third round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals |
| 5 | Jo-Wilfried Tsonga | 6 | 4 | 6 | | | | | | | | | | | | | | |
| WC | Denis Zivkovic | 3 | 6 | 4 | 5 | J-W Tsonga | 6 | 6 | | | | | | | | | | |
| | Lado Chikhladze | 6$^3$ | 6$^7$ | | | J Goodall | 3 | 4 | | | | | | | | | | |
| | Josh Goodall | 7$^7$ | 7$^9$ | | | | | | | 5 | J-W Tsonga | 7$^7$ | 6 | | | | | |
| | Nestor Briceno | 4 | 3 | | | | | | | 9 | S Rieschick | 6$^2$ | 4 | | | | | |
| WC | Vahid Mirzadeh | 6 | 6 | | WC | V Mirzadeh | 1 | 0 | | | | | | | | | | |
| | Kim Sun-yong | 2 | 2 | | 9 | S Rieschick | 6 | 6 | | | | | | | | | | |
| 9 | Sebastian Rieschick | 6 | 6 | | | | | | | | | | | | 5 | J-W Tsonga | 6 | 7$^7$ |
| 14 | Luis-Manuel Flores | 6 | 6 | | | | | | | | | | | | 3 | B Baker | 3 | 6$^2$ |
| WC | Timothy Neilly | 0 | 4 | | 14 | L-M Flores | 7$^7$ | 1 | 6 | | | | | | | | | |
| WC | Robert Yim | 6 | 6 | | WC | R Yim | 6$^4$ | 6 | 1 | | | | | | | | | |
| Q | Fabio Fognini | 0 | 3 | | | | | | | 14 | L-M Flores | 6 | 4 | 4 | | | | |
| Q | Gaël Monfils | 6 | 6 | | | | | | | 3 | B Baker | 4 | 6 | 6 | | | | |
| Q | Miles Kasiri | 4 | 2 | | Q | G Monfils | 4 | 2 | | | | | | | | | | |
| | Juan-Pablo Amado | 1 | 1 | | 3 | B Baker | 6 | 6 | | | | | | | | | | |
| 3 | Brian Baker | 6 | 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 |
| 8 | Chris Guccione | 6 | 5 | 7$^{11}$ | | | | | | | | | | | | | |
| | Romano Tatuhey | 4 | 7 | 6$^9$ | 8 | C Guccione | 7$^{13}$ | 6 | | | | | | | | | |
| | Matthias Wellermann | 3 | 6 | 4 | | J Ouanna | 6$^{11}$ | 4 | | | | | | | | | |
| | Josselin Ouanna | 6 | 4 | 6 | | | | | 8 | C Guccione | 6$^4$ | 6 | 2 | | | | |
| | Scott Oudsema | 6 | 6 | | | | | | 12 | A Murray | 7$^7$ | 4 | 6 | | | | |
| | Aleksey Malajko | 4 | 1 | | | S Oudsema | 4 | 4 | | | | | | | | | |
| Q | Phillip Simmonds | 7$^9$ | 4 | 3 | 12 | A Murray | 6 | 6 | | | | | | | | | |
| 12 | Andy Murray | 6$^7$ | 6 | 6 | | | | | | | | | | 12 | A Murray | 1 | 5 |
| 15 | Leonardo Kirche | 6 | 4 | 6 | | | | | | | | | | 2 | F Mergea | 6 | 7 |
| | Devin Mullings | 3 | 6 | 1 | 15 | L Kirche | 4 | 4 | | | | | | | | | |
| WC | Jamil Al Agba | 2 | 7$^7$ | 6 | WC | J Al Agba | 6 | 6 | | | | | | | | | |
| Q | Jesse Huta Galung | 6 | 6$^5$ | 2 | | | | | WC | J Al Agba | 1 | 6 | 3 | | | | |
| | Adam Fass | 6 | 4 | 6 | | | | | 2 | F Mergea | 6 | 3 | 6 | | | | |
| | Karan Rastogi | 3 | 6 | 0 | | A Fass | 5 | 1 | | | | | | | | | |
| | Rafael Arévalo | 2 | 0 | | 2 | F Mergea | 7 | 6 | | | | | | | | | |
| 2 | Florin Mergea | 6 | 6 | | | | | | | | | | | | | | |

## Sources

* Draw