| Fecha | Jugador | Llega a | Tipo | Precio |
|---|---|---|---|---|
| 1 jul 2021 | Brooklyn Kabongolo | Ipswich Town U23 | Fichaje | — |
| 1 jul 2021 | Lucas Noubi | Standard de Liège 16 FC | Fichaje | — |
| 1 jul 2021 | Lewis Miley | Newcastle U18 | Fichaje | — |
| 1 jul 2021 | Kenan Toibibou | LB Châteauroux U19 | Fichaje | Sin coste |
| 1 jul 2021 | Dimitrios Kaloskamis | Panathinaikos U19 | Fichaje | — |
| 1 jul 2021 | Ben Lloyd | Swansea City U18 | Fichaje | Sin coste |
| 1 jul 2021 | Martín Satriano | Inter Milan | Fichaje | — |
| 1 jul 2021 | Brooklyn Kabongolo | Ipswich Town U21 | Fichaje | Sin coste |
| 1 jul 2021 | Veljko Milosavljević | Red Star Belgrade U16 | Fichaje | — |
| 1 jul 2021 | Jon de Luis Suescun | UD Mutilvera | Cesión | — |
| 1 jul 2021 | David Odogu | VfL Wolfsburg U17 | Fichaje | — |
| 1 jul 2021 | Iker Alday Igartua | SD Eibar B | Fichaje | — |
| 1 jul 2021 | Rico Lewis | Man City U18 | Fichaje | — |
| 1 jul 2021 | Giovanni Leoni | Padova Under 17 | Fichaje | — |
| 1 jul 2021 | Hugo Solozábal | Atlético Madrid U18 (-2024) | Fichaje | — |
| 1 jul 2021 | Lloyd Jones | Cambridge United | Fichaje | Sin coste |
| 1 jul 2021 | Óscar Aranda | Real Madrid Castilla | Fichaje | — |
| 1 jul 2021 | Paulo Moreira | FC Felgueiras 1932 | Fichaje | — |
| 1 jul 2021 | Dirk Asare | Jong KV Mechelen | Fichaje | Sin coste |
| 1 jul 2021 | Niccolò Pisilli | Roma U18 | Fichaje | — |
| 1 jul 2021 | Wiktor Nowak | Znicz Pruszkow II | Fichaje | — |
| 1 jul 2021 | Aimar Vicandi Alzola | Athletic Juv. B | Fichaje | — |
| 1 jul 2021 | Santiago Colombatto | Club León FC | Fichaje | €800k |
| 1 jul 2021 | Daniel Mesonero Miguel | R. Madrid Juv.C | Fichaje | — |
| 1 jul 2021 | Josep Cerdà | FC Barcelona U19 | Fichaje | — |
| 1 jul 2021 | Lewis Brunt | Leicester City U21 | Fichaje | Sin coste |
| 1 jul 2021 | Lucas Esquivel | CA Unión (Santa Fe) | Fichaje | Sin coste |
| 1 jul 2021 | Tamás Szűcs | Kispest-Honvéd FC II | Fichaje | — |
| 1 jul 2021 | Lamare Bogarde | Aston Villa U21 | Fichaje | — |
| 1 jul 2021 | Florian Gerstl | ASK-BSC Bruck/Leitha (- 2023) | Fichaje | Sin coste |
| 1 jul 2021 | Alberto Calatrava Ragull | Alboraya Juv. A | Fichaje | — |
| 1 jul 2021 | Clark Robertson | Portsmouth FC | Fichaje | — |
| 1 jul 2021 | Daniel Maderner | SK Beveren | Fichaje | Sin coste |
| 1 jul 2021 | Andrew Moran | Brighton & Hove Albion U21 | Fichaje | Sin coste |
| 1 jul 2021 | Emirhan Yılmaz | Caykur Rizespor U19 | Fichaje | Sin coste |
| 1 jul 2021 | Rob Apter | Blackpool FC U21 | Fichaje | Sin coste |
| 1 jul 2021 | Rani Khedira | 1.FC Unión Berlín | Free | Free |
| 1 jul 2021 | James Trafford | Accrington Stanley | Cesión | — |
| 1 jul 2021 | Jordi Altena | Vitesse U21 | Fichaje | — |
| 1 jul 2021 | Jack Hinshelwood | Brighton U18 | Fichaje | — |