# 2003 Australian Open – Boys' singles

Clément Morel was the defending champion, but did not compete in the Juniors in this year.
Marcos Baghdatis defeated Florin Mergea (6–4, 6–4) in the final.

## Seeds

* Marcos Baghdatis (champion)
* Brian Baker (third round)
* Chris Kwon (first round)
* Mathieu Montcourt (semifinals)
* Jo-Wilfried Tsonga (semifinals)
* Florin Mergea (final)
* Adrian Ungur (first round)
* Chris Guccione (third round)
* Scott Oudsema (first round)
* Jose-Luis Muguruza (second round)
* David Brewer (second round)
* Phillip Simmonds (quarterfinals)
* Jarrett Chirico (second round)
* Gaël Monfils (quarterfinals)
* Horia Tecău (third round)
* Mischa Zverev (third 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 | Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final |
| 1 | Marcos Baghdatis | 6 | 6 | | | | | | | | |
| | Brendan Evans | 2 | 2 | | | | | | | | |
| | Brendan Evans | 2 | 2 | 1 | Marcos Baghdatis | 6 | 7$^{11}$ | | | | |
| | | | | 5 | Jo-Wilfried Tsonga | 4 | 6$^9$ | | | | |
| | Eric Scherer | 1 | 1 | 5 | Jo-Wilfried Tsonga | 4 | 6$^9$ | | | | |
| 5 | Jo-Wilfried Tsonga | 6 | 6 | | | | | | | | |
| 5 | Jo-Wilfried Tsonga | 6 | 6 | | | | | 1 | Marcos Baghdatis | 6 | 6 |
| | | | | | | | | 6 | Florin Mergea | 4 | 4 |
| 12 | Phillip Simmonds | 0 | 2 | | | | | | | | | 6 | Florin Mergea | 4 | 4 |
| 4 | Mathieu Montcourt | 6 | 6 | | | | | | | | |
| 4 | Mathieu Montcourt | 6 | 6 | 4 | Mathieu Montcourt | 2 | 6$^5$ | | | | |
| | | | | 6 | Florin Mergea | 6 | 7$^7$ | | | | |
| 6 | Florin Mergea | 6 | 6 | 6 | Florin Mergea | 6 | 7$^7$ | | | | |
| 14 | Gaël Monfils | 3 | 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 | Marcos Baghdatis | 7 | 6 | | | | | | | | | | | | | | | |
| | Fred Gil | 5 | 3 | | 1 | M Baghdatis | 4 | 6 | 6 | | | | | | | | | |
| | David North | 7 | 5 | 1 | | L Rosol | 6 | 1 | 2 | | | | | | | | | |
| | Lukáš Rosol | 5 | 7 | 6 | | | | | | 1 | M Baghdatis | 6 | 6 | | | | | |
| | Alexander Petropoulos | 3 | 1 | | | | | | | | J Ouanna | 4 | 3 | | | | | |
| | Josselin Ouanna | 6 | 6 | | | J Ouanna | 6 | 6 | | | | | | | | | | |
| | Brian Hung | 6 | 0 | 1 | 13 | J Chirico | 2 | 4 | | | | | | | | | | |
| 13 | Jarrett Chirico | 1 | 6 | 6 | | | | | | | | | | | 1 | M Baghdatis | 6 | 6 |
| 9 | Scott Oudsema | 3 | 2 | | | | | | | | | | | | | B Evans | 2 | 2 |
| | Guy Thomas | 6 | 6 | | | G Thomas | 6 | 6 | | | | | | | | | | |
| | Somdev Devvarman | 5 | 6 | 6 | | S Devvarman | 0 | 2 | | | | | | | | | | |
| | Rick Schmidt | 7 | 4 | 2 | | | | | | | G Thomas | 1 | 6 | 2 | | | | |
| | Robert Smeets | 3 | 3 | | | | | | | | B Evans | 6 | 4 | 6 | | | | |
| | Brendan Evans | 6 | 6 | | | B Evans | 6 | 6 | | | | | | | | | | |
| | Bernhard Deussner | 7 | 6 | | | B Deussner | 1 | 2 | | | | | | | | | | |
| 7 | Adrian Ungur | 5 | 4 | | | | | | | | | | | | | | | |

#### Section 2

| 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 |
| 3 | Chris Kwon | 3 | 2 | | | | | | | | | | | | | | |
| Q | Dejan Cvetkovic | 6 | 6 | | Q | D Cvetkovic | 3 | 6$^4$ | | | | | | | | | |
| | Eric Scherer | 6 | 6 | | | E Scherer | 6 | 7$^7$ | | | | | | | | | |
| | Christopher Singh | 4 | 3 | | | | | | | E Scherer | 6$^3$ | 6 | 6 | | | | |
| Q | Todd Ley | 4 | 6$^2$ | | | | | | 15 | H Tecău | 7$^7$ | 1 | 4 | | | | |
| Q | Woong-Sun Jun | 6 | 7$^7$ | | Q | W-S Jun | 4 | 1 | | | | | | | | | |
| WC | Patrick Jozwik | 3 | 1 | | 15 | H Tecău | 6 | 6 | | | | | | | | | |
| 15 | Horia Tecău | 6 | 6 | | | | | | | | | | | | E Scherer | 1 | 1 |
| 10 | Jose-Luis Muguruza | 6 | 6 | | | | | | | | | | | 5 | J-W Tsonga | 6 | 6 |
| WC | Clint Harris | 3 | 1 | | 10 | J-L Muguruza | 1 | 2 | | | | | | | | | |
| | Sergiy Stakhovsky | 6 | 6 | | | S Stakhovsky | 6 | 6 | | | | | | | | | |
| | Goran Belosevic | 4 | 0 | | | | | | | S Stakhovsky | 4 | 0$^r$ | | | | | |
| Q | Jimmy Schneider | 6$^2$ | 7 | 0 | | | | | 5 | J-W Tsonga | 6 | 2 | | | | | |
| | Adam Feeney | 7$^7$ | 5 | 6 | | A Feeney | 2 | 3 | | | | | | | | | |
| WC | Chris Biro | 0 | 2 | | 5 | J-W Tsonga | 6 | 6 | | | | | | | | | |
| 5 | Jo-Wilfried Tsonga | 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 | Chris Guccione | 6 | 6 | | | | | | | | | | | | | |
| Q | Ruben Gonzales | 2 | 3 | | 8 | C Guccione | 6 | 6 | | | | | | | | |
| | Roman Kutac | 6$^5$ | 7$^7$ | 2 | | J de Armas | 1 | 1 | | | | | | | | |
| | Juan de Armas | 7$^7$ | 6$^3$ | 6 | | | | | 8 | C Guccione | 6$^6$ | 4 | | | | |
| Q | Andrei Radulescu | 4 | 3 | | | | | | 12 | P Simmonds | 7$^8$ | 6 | | | | |
| WC | David Jeflea | 6 | 2$^r$ | | Q | A Radulescu | 1 | 1 | | | | | | | | |
| | Andis Juška | 3 | 5 | | 12 | P Simmonds | 6 | 6 | | | | | | | | |
| 12 | Phillip Simmonds | 6 | 7 | | | | | | | | | | 12 | P Simmonds | 0 | 2 |
| 16 | Mischa Zverev | 7 | 6 | | | | | | | | | | 4 | M Montcourt | 6 | 6 |
| WC | Chris Letcher | 5 | 4 | | 16 | M Zverev | 6 | 6 | | | | | | | | |
| | Richard Irwin | 4 | 4 | | | G.D. Jones | 3 | 0 | | | | | | | | |
| | G.D. Jones | 6 | 6 | | | | | | 16 | M Zverev | 2 | 3 | | | | |
| | Karan Rastogi | 6 | 6 | | | | | | 4 | M Montcourt | 6 | 6 | | | | |
| WC | Lachlan Ferguson | 2 | 2 | | | K Rastogi | 4 | 5 | | | | | | | | |
| | Karolj Fodor | 4 | 2 | | 4 | M Montcourt | 6 | 7 | | | | | | | | |
| 4 | Mathieu Montcourt | 6 | 6 | | | | | | | | | | | | | |

#### Section 4

| 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 |
| 6 | Florin Mergea | 6 | 7$^7$ | | | | | | | | | | | | | | |
| Q | Sergei Bubka | 2 | 6$^2$ | 6 | F Mergea | 6 | 6 | | | | | | | | | | |
| | Marco Hosang | 6 | 6 | | M Hosang | 2 | 2 | | | | | | | | | | |
| | Fotis Fotakis | 4 | 2 | | | | | | 6 | F Mergea | 3 | 6 | 6 | | | | |
| | Patrick Woelfler | 7 | 6 | | | | | | | P Woelfler | 6 | 3 | 3 | | | | |
| | Lado Chikhladze | 5 | 4 | | P Woelfler | 7 | 0 | 6 | | | | | | | | | |
| | Adrian Szatmary | 4 | 2 | 11 | D Brewer | 5 | 6 | 2 | | | | | | | | | |
| 11 | David Brewer | 6 | 6 | | | | | | | | | | | 6 | F Mergea | 6 | 6 |
| 14 | Gaël Monfils | 6 | 6 | | | | | | | | | | | 14 | G Monfils | 3 | 2 |
| Q | Ervin Eleskovic | 2 | 4 | 14 | G Monfils | 3 | 7 | 6 | | | | | | | | | |
| WC | David Galic | 3 | 3 | WC | J Kerley | 6 | 5 | 3 | | | | | | | | | |
| WC | Joel Kerley | 6 | 6 | | | | | | 14 | G Monfils | 6 | 6 | | | | | |
| | Suk Hyun-joon | 7 | 6 | | | | | | 2 | B Baker | 4 | 4 | | | | | |
| | Artem Sitak | 5 | 1 | | H-j Suk | 6 | 2 | 7 | | | | | | | | | |
| | Kenichiro Nakahara | 2 | 1 | 2 | B Baker | 4 | 6 | 9 | | | | | | | | | |
| 2 | Brian Baker | 6 | 6 | | | | | | | | | | | | | | |

## Sources

* Draw