| Fecha | Jugador | Llega a | Tipo | Precio |
|---|---|---|---|---|
| 1 jul 2021 | Robbie Ure | Rangers FC B | Fichaje | — |
| 1 jul 2021 | Sergio Mestre Sánchez | Madrileño Juv.A | Fichaje | — |
| 1 jul 2021 | Gabin Bernardeau | Le Mans FC U17 | Fichaje | — |
| 1 jul 2021 | Calum Scanlon | Liverpool FC U18 | Fichaje | Sin coste |
| 1 jul 2021 | Gustavo Martins de Souza Santos | Grêmio Foot-Ball Porto Alegrense | N/A | N/A |
| 1 jul 2021 | Alberto Flores | Sevilla Juv. A | Fichaje | — |
| 1 jul 2021 | Dani Slory | NAC Breda Youth | Fichaje | — |
| 1 jul 2021 | Francesco Coppola | Juventus U17 | Fichaje | — |
| 1 jul 2021 | Kévin Mouanga | FC Annecy | Fichaje | Sin coste |
| 1 jul 2021 | John Yeboah | Almere City FC | Cesión | — |
| 1 jul 2021 | Dario Špikić | Dinamo Zagreb | N/A | N/A |
| 1 jul 2021 | Ludovit Reis | Hamburgo SV | Free | Free |
| 1 jul 2021 | Mohamed Kaba | Jammerbugt FC | Cesión | — |
| 1 jul 2021 | Yoel Lago | Celta Juvenil A | Fichaje | — |
| 1 jul 2021 | Denzel De Roeve | Club NXT | Fichaje | Sin coste |
| 1 jul 2021 | Kassoum Ouattara | Amiens SC B | Fichaje | Sin coste |
| 1 jul 2021 | Frederik Flex | Parma Under 18 | Fichaje | Sin coste |
| 1 jul 2021 | Kayne Ramsay | Crewe Alexandra | Cesión | Préstamo / cesión |
| 1 jul 2021 | Lawrence Ofori | FC Famalicão | N/A | N/A |
| 1 jul 2021 | Chidozie Awaziem | Boavista FC | Fichaje | €5.0M |
| 1 jul 2021 | Jesús Owono | Deportivo Alavés B | Fichaje | — |
| 1 jul 2021 | Daniel Ballesteros Fernández | R. Madrid Juv.A | Fichaje | — |
| 1 jul 2021 | Joaquín Panichelli | CA River Plate II | Fichaje | — |
| 1 jul 2021 | Ton Ripoll | Penya Deportiva Santa Eulalia | Fichaje | — |
| 1 jul 2021 | Josh Coburn | Middlesbrough FC | Fichaje | Sin coste |
| 1 jul 2021 | Marvel | Real Madrid U19 | Fichaje | — |
| 1 jul 2021 | Yarek Gąsiorowski Hernandis | Valencia Juv. A | Fichaje | — |
| 1 jul 2021 | David Jiménez | R. Madrid Juv.B | Fichaje | — |
| 1 jul 2021 | Miguel Patricío | SL Benfica U15 | Fichaje | — |
| 1 jul 2021 | Kike García | CA Osasuna | Fichaje | — |
| 1 jul 2021 | Diego Sánchez | Sporting B | Fichaje | — |
| 1 jul 2021 | Kilian Basba Geeke Nikièma | ADO U21 | Fichaje | — |
| 1 jul 2021 | Marvin Pieringer | FC Schalke 04 | Cesión | Loan |
| 1 jul 2021 | Manfred Fischer | FK Austria Viena | Fichaje | Sin coste |
| 1 jul 2021 | Nevio Biner | FC Sion U16 | Fichaje | Sin coste |
| 1 jul 2021 | Nico Schlotterbeck | SC Friburgo | N/A | N/A |
| 1 jul 2021 | Sergio Camello | Atlético de Madrid | Fichaje | — |
| 1 jul 2021 | Adrián Butzke | Granada II | N/A | N/A |
| 1 jul 2021 | Lesley Ugochukwu | Stade Rennais FC | Fichaje | Sin coste |
| 1 jul 2021 | Chris Führich | SC Paderborn 07 | € 700K | €700k |