| Fecha | Jugador | Llega a | Tipo | Precio |
|---|---|---|---|---|
| 1 jul 2021 | Eli Junior Éric Anatole Rainha Kroupi | FC Lorient U17 | Fichaje | — |
| 1 jul 2021 | Eneko Satrústegui Plano | Racing Club | Fichaje | — |
| 1 jul 2021 | Davide Bartesaghi | Milan Cad. A | Fichaje | — |
| 1 jul 2021 | Archie James Francis Gray | Leeds U18 | Fichaje | — |
| 1 jul 2021 | Weston James Earl McKennie | Juventus FC | Fichaje | €21.9M |
| 1 jul 2021 | Johaneko | G. Bordeaux B | Fichaje | — |
| 1 jul 2021 | Eneko Astigarraga Alkorta | Real Soc. Juv.A | Fichaje | — |
| 1 jul 2021 | Liam Polworth | Kilmarnock FC | Fichaje | — |
| 1 jul 2021 | Ismael Sierra Arnal | Betis Juvenil A | Fichaje | — |
| 1 jul 2021 | Marash Kumbulla | AS Roma | Fichaje | €26.5M |
| 1 jul 2021 | Crysencio Jilbert Sylverio Summerville | Leeds United FC | Fichaje | — |
| 1 jul 2021 | Fodé Sanassy Sylla | RC Lens U17 | Fichaje | — |
| 1 jul 2021 | Ante Budimir | CA Osasuna | Fichaje | €8.0M |
| 1 jul 2021 | Nhoa Ryan Sangui | Stade Reims U17 | Fichaje | — |
| 1 jul 2021 | Amadou Matar Coundoul | UD Llanera | Fichaje | — |
| 1 jul 2021 | Landry Céphas Farré Miró | Barça Cad. A | Fichaje | — |
| 1 jul 2021 | Xabier Irurita Larrayoz | CA Osasuna Promesas | Fichaje | — |
| 1 jul 2021 | José Luis Català Vázquez | Esp. Juvenil A | Fichaje | — |
| 1 jul 2021 | Lamine Sy | SM Caen B | Fichaje | — |
| 1 jul 2021 | Samuel James Hart | Oldham Athletic | Fichaje | — |
| 1 jul 2021 | Marc Pubill Pagés | Atlético Levante UD | Fichaje | — |
| 1 jul 2021 | Eduard Sobol | Club Brujas KV | Fichaje | €3.5M |
| 1 jul 2021 | Lohann Doucet | FC Nantes B | Fichaje | — |
| 1 jul 2021 | Mario de Luis Jiménez | Real Madrid Castilla | Fichaje | — |
| 1 jul 2021 | Alexis Mirbach | FC Metz U19 | Fichaje | — |
| 1 jul 2021 | Josué Casimir | Le Havre AC | Fichaje | — |
| 1 jul 2021 | Álvaro Ginés Hernández Sánchez | R. Madrid Juv.C | Fichaje | — |
| 1 jul 2021 | Romaine Lee Mundle | Tottenham U23 | Fichaje | — |
| 1 jul 2021 | Soungoutou Magassa | Monaco B | Fichaje | — |
| 1 jul 2021 | Rayane Belaid Khelil | Atlético Juv. B | Fichaje | — |
| 1 jul 2021 | Jordan Anthony James | Birmingham City | Fichaje | — |
| 1 jul 2021 | Rafael Rodríguez Ruiz | Málaga Juv. A | Fichaje | — |
| 1 jul 2021 | Nicola Leali | Ascoli Calcio | Fichaje | — |
| 1 jul 2021 | Juan David Fuentes Garrido | Barça Juv. A | Fichaje | — |
| 1 jul 2021 | Charlie Reilly | Albion Rovers | Fichaje | — |
| 1 jul 2021 | Adrián Suárez Ortega | Roda Juvenil A | Fichaje | — |
| 1 jul 2021 | Diego Méndez Molero | Rayo Vallecano B | Fichaje | — |
| 1 jul 2021 | Aleksa Puric | Teleoptik | Cesión | — |
| 1 jul 2021 | Iñigo Vicente Elorduy | CD Mirandés | Cesión | — |
| 1 jul 2021 | Calvin Miller | FC Chesterfield | Fichaje | — |