| Fecha | Jugador | Llega a | Tipo | Precio |
|---|---|---|---|---|
| 1 jul 2021 | Duplexe Tchamba Bangou | Sonderjyske | N/A | N/A |
| 1 jul 2021 | Zach Abbott | Nottingham U18 | Fichaje | — |
| 1 jul 2021 | Selvi Clua | Girona FC U18 | Fichaje | — |
| 1 jul 2021 | Jonas Feddersen | Borussia Dortmund Youth | Fichaje | Sin coste |
| 1 jul 2021 | Malick Fofana | Jong KAA Gent | Fichaje | — |
| 1 jul 2021 | Luis Bilbao Arechaga | CD Basconia | Fichaje | — |
| 1 jul 2021 | Lutfi Dalipi | BSC Young Boys U16 | Fichaje | Sin coste |
| 1 jul 2021 | Andrés Carlos Caro Serrano | Atlético Malagueño | Fichaje | — |
| 1 jul 2021 | Rokas Pukstas | HNK Hajduk Split U19 | Fichaje | Sin coste |
| 1 jul 2021 | Anes Krdzalic | Din. Zagreb U19 | Fichaje | — |
| 1 jul 2021 | Arthur Zagré | FC Utrecht | Cesión | — |
| 1 jul 2021 | Bruno Pérez Iriz | R. Madrid Juv.C | Fichaje | — |
| 1 jul 2021 | Rafik Messali | Toulouse B | Fichaje | — |
| 1 jul 2021 | Iván Garriel | Vallad. Juv. A | Fichaje | — |
| 1 jul 2021 | Lucas Terrer Casas | Zaragoza Juv. A | Fichaje | — |
| 1 jul 2021 | Mateo Sanabria | CA Lanús II | Fichaje | Sin coste |
| 1 jul 2021 | Anosike Ementa | Aalborg BK | Fichaje | Sin coste |
| 1 jul 2021 | Cameron Humphreys | Ipswich Town U23 | Fichaje | — |
| 1 jul 2021 | Stijn van Gassel | Excelsior Rotterdam | Fichaje | — |
| 1 jul 2021 | Tayo Adaramola | Crystal Palace U21 | Fichaje | Sin coste |
| 1 jul 2021 | Lander Pinillos Wilson | Mutilvera Juv.A | Fichaje | — |
| 1 jul 2021 | Javier Boñar | Atlético Juv. B | Fichaje | — |
| 1 jul 2021 | Nail Omerovic | FK Sloboda Tuzla | Fichaje | — |
| 1 jul 2021 | Tijn Smolenaars | PSV U17 | Fichaje | — |
| 1 jul 2021 | Carlos López | Málaga Juv. A | Fichaje | — |
| 1 jul 2021 | Callum Burton | Plymouth Argyle | Fichaje | Sin coste |
| 1 jul 2021 | Matěj Šín | Ostrava U19 | Fichaje | — |
| 1 jul 2021 | Harvey Vale | Chelsea FC U21 | Fichaje | Sin coste |
| 1 jul 2021 | Jorge Montes García | Sporting Juv. A | Fichaje | — |
| 1 jul 2021 | Joaquín Delgado | Córdoba CF B | Fichaje | — |
| 1 jul 2021 | Leny Meyer | FC Luzern U21 | Fichaje | — |
| 1 jul 2021 | Aleksandar Dragovic | Estrella Roja de Belgrado | Fichaje | Sin coste |
| 1 jul 2021 | Alain Ribeiro | CD Tudelano | Fichaje | — |
| 1 jul 2021 | Malamine Efekele | AS Monaco U19 | Fichaje | Sin coste |
| 1 jul 2021 | Stavros Pilios | Iraklis 1908 | Cesión | Loan |
| 1 jul 2021 | Dane Murray | Celtic Reserves | Fichaje | — |
| 1 jul 2021 | Rodri Alonso | FC Villarreal C | Fichaje | — |
| 1 jul 2021 | Jonathan Rowe | Norwich City U21 | Fichaje | — |
| 1 jul 2021 | Axel Camblan | Stade Brest 29 B | Fichaje | — |
| 1 jul 2021 | João Carvalho | Nottingham Forest FC | N/A | N/A |