400 metres Freestyle, Boys
Participants
| Nr. | Athlete | NOC |
|---|---|---|
| 1 | Justin James |  AUS |
| 2 | Yaraslau Pronin |  BLR |
| 3 | Victor Rodrigues |  BRA |
| 4 | Jeremy Bagshaw |  CAN |
| 5 | Chad Bobrosky | CAN |
| 6 | Dai Jun |  CHN |
| 7 | Jorge Masson |  ECU |
| 8 | Amr Mohamed |  EGY |
| 9 | Ganesh Pedurand |  FRA |
| 10 | Henk Lowe |  GUY |
| 11 | Allan Gutiérrez |  HON |
| 12 | Péter Bernek |  HUN |
| 13 | Balázs Zámbó | HUN |
| 14 | Anton McKee |  ISL |
| 15 | Kevin Lim |  MAS |
| 16 | Marko Blaževski |  MKD |
| 17 | Matt Stanley |  NZL |
| 18 | Sebastián Arispe |  PER |
| 19 | Gustavo Santa |  POR |
| 20 | Chad le Clos |  RSA |
| 21 | Clement Lim |  SGP |
| 22 | Stefan Šorak |  SRB |
| 23 | Pavol Jelenák |  SVK |
| 24 | Gustav Åberg Lejdström |  SWE |
| 25 | Fedy Hannachi |  TUN |
| 26 | Bertuğ Coşkun |  TUR |
| 27 | Thomas Stephens |  USA |
| 28 | Cristian Quintero |  VEN |
Non-starters
| Nr. | Athlete | NOC |
|---|---|---|
| 1 | Adrián Mantas |  ESP |