400mH BOYS , Heat:2 of 2 ; Official result since 15:28
| Rank | Lane | ID | Name | SB | Team | Cat | Result | Info | Video |
| 1 | 7 | 13 | HUFNAGL Dominik | 53"99 | AUT | Youth | 54.04 | Q | |
| 2 | 6 | 399 | LOGINOV Ivan | 54"00 | RUS | Youth | 54.28 | Q | |
| 3 | 3 | 180 | COROLLER Victor | FRA | Youth | 54.69 | Q | ||
| 4 | 5 | 85 | VASILEIOU Anastasios | 54"84 | CYP | Youth | 55.94 | q | |
| 5 | 2 | 263 | MONTEFALCONE Gabriele | 55"44 | ITA | Youth | 56.57 | ||
| 6 | 8 | 54 | BARYSEVICH Andrei | 56"52 | BLR | Youth | 57.47 | ||
| 4 | 21 | ALIYEV Murad | 57"00 | AZE | Youth | DIS | Art.162.6 |