AustriaCon el Red Bull Salzburgo, Seiwald ganó múltiples títulos de la Bundesliga austriaca y la Copa de Austria. A nivel individual, fue reconocido como uno de los jóvenes talentos más prometedores del fútbol austriaco.
Nicolas Seiwald es un centrocampista defensivo austriaco que se formó en las categorías inferiores del Red Bull Salzburgo. Debutó con el primer equipo en 2020 y rápidamente se consolidó como una pieza clave en el mediocampo del club. En 2023, fue transferido al RB Leipzig de la Bundesliga alemana.
Seiwald es un mediocampista defensivo conocido por su excelente capacidad de recuperación de balón y su inteligencia táctica. Destaca por su buen posicionamiento, su habilidad para romper líneas de pase rivales y su precisión en la distribución del juego. Su principal debilidad es su limitada capacidad ofensiva y su falta de velocidad en transiciones rápidas.
| Season | Comp | Apps | G | A | YC | RC | Min |
|---|---|---|---|---|---|---|---|
| 25/26 | Bundesliga | 33 | 0 | 2 | 2 | 0 | 2704 |
| 25/26 | International Friendlies | 3 | 1 | 0 | 0 | 0 | 209 |
| 25/26 | DFB-Pokal | 4 | 0 | 0 | 1 | 0 | 342 |
| 24/25 | UEFA Nations League B | 6 | 0 | 1 | 0 | 0 | 540 |
| 24/25 | Bundesliga | 30 | 0 | 0 | 2 | 0 | 2080 |
| 24/25 | DFB-Pokal | 4 | 0 | 0 | 2 | 0 | 271 |
| 24/25 | UEFA Champions League | 7 | 0 | 1 | 0 | 0 | 405 |
| 23/24 | Bundesliga | 21 | 0 | 2 | 1 | 0 | 707 |
| 23/24 | International Friendlies | 6 | 0 | 0 | 1 | 0 | 540 |
| 23/24 | Franz-Beckenbauer-Supercup | 1 | 0 | 0 | 0 | 0 | 90 |
| 23/24 | DFB-Pokal | 1 | 0 | 0 | 0 | 0 | 65 |
| 23/24 | UEFA Champions League | 4 | 0 | 0 | 0 | 0 | 272 |
| 22/23 | UEFA Nations League A | 6 | 0 | 0 | 1 | 0 | 495 |
| 22/23 | ÖFB-Cup | 4 | 0 | 1 | 0 | 0 | 345 |
| 22/23 | International Friendlies | 1 | 0 | 0 | 1 | 0 | 90 |
| 22/23 | European Qualifiers | 8 | 0 | 0 | 1 | 0 | 720 |
| 22/23 | UEFA Europa League | 2 | 0 | 0 | 0 | 0 | 165 |
| 22/23 | UEFA Champions League | 6 | 1 | 0 | 0 | 0 | 540 |
| 22/23 | Bundesliga | 31 | 3 | 2 | 3 | 0 | 2588 |
| 21/22 | UEFA European Under-21 Championship Qualifying | 6 | 1 | 0 | 1 | 0 | 530 |
| 21/22 | World Cup Qualification Playoffs | 1 | 0 | 0 | 0 | 0 | 90 |
| 21/22 | ÖFB-Cup | 5 | 1 | 0 | 0 | 0 | 408 |
| 21/22 | International Friendlies | 0 | 0 | 0 | 0 | 0 | 0 |
| 21/22 | UEFA Champions League Qualifying | 2 | 0 | 0 | 0 | 0 | 180 |
| 21/22 | UEFA Champions League | 8 | 0 | 1 | 2 | 0 | 650 |
| 21/22 | Bundesliga | 32 | 0 | 9 | 3 | 0 | 2417 |
| 2025 | World Cup Qualifiers (Europe) | 8 | 0 | 1 | 0 | 0 | 707 |
| 2025 | UEFA Nations League Play-off | 2 | 0 | 0 | 0 | 0 | 180 |
| 2024 | UEFA Euro | 4 | 0 | 0 | 0 | 0 | 360 |
| 2021 | World Cup Qualifiers (Europe) | 2 | 0 | 0 | 0 | 0 | 162 |
| 20/21 | ÖFB-Cup | 3 | 0 | 0 | 0 | 0 | 43 |
| 20/21 | International Friendlies | 3 | 1 | 0 | 0 | 0 | 140 |
| 20/21 | UEFA Europa League | 0 | 0 | 0 | 0 | 0 | 0 |
| 20/21 | UEFA Champions League Qualifying | 0 | 0 | 0 | 0 | 0 | 0 |
| 20/21 | UEFA Champions League | 0 | 0 | 0 | 0 | 0 | 0 |
| 20/21 | 2. Liga | 11 | 2 | 3 | 2 | 0 | 982 |
| 20/21 | Bundesliga | 15 | 0 | 2 | 1 | 0 | 549 |
| 19/20 | 2. Liga | 23 | 3 | 4 | 2 | 0 | 2046 |
| 19/20 | UEFA Youth League | 10 | 3 | 2 | 3 | 0 | 785 |
| 18/19 | ÖFB Jugendliga U18 | 21 | 2 | 0 | 1 | 0 | 1851 |
| 18/19 | International Friendlies | 1 | 0 | 0 | 0 | 0 | 64 |
| 18/19 | 2. Liga | 3 | 0 | 0 | 0 | 0 | 108 |
| 17/18 | UEFA European Under-17 Championship qualification | 6 | 0 | 0 | 0 | 0 | 262 |
| 17/18 | ÖFB Jugendliga U16 | 1 | 0 | 0 | 0 | 0 | 67 |
| 17/18 | ÖFB Jugendliga U18 | 21 | 0 | 0 | 3 | 0 | 1659 |
| 17/18 | International Friendlies | 3 | 0 | 0 | 0 | 0 | 154 |
| 16/17 | ÖFB Jugendliga U16 | 18 | 3 | 0 | 1 | 0 | 1262 |
| 15/16 | International Friendlies | 2 | 1 | 0 | 0 | 0 | 55 |