| Fecha | Jugador | Llega a | Tipo | Precio |
|---|---|---|---|---|
| 1 jul 2021 | Formose Mendy | Amiens SC | Fichaje | — |
| 1 jul 2021 | Mamadou Sarr | Olymp. Lyon U19 | Fichaje | — |
| 1 jul 2021 | Wilson Serge Eric Odobert | Paris SG U19 | Fichaje | — |
| 1 jul 2021 | Alexander Petxarroman Eizagirre | Athletic Club | Fichaje | — |
| 1 jul 2021 | Cristian David Perea Cajiao | R. Madrid Juv.C | Fichaje | — |
| 1 jul 2021 | Václav Hladký | Ipswich Town | Fichaje | — |
| 1 jul 2021 | Ángel Carvajal García | R. Madrid Juv.B | Fichaje | — |
| 1 jul 2021 | Mario Domínguez Franco | Valencia Juv. A | Fichaje | — |
| 1 jul 2021 | Pablo Vázquez Pérez | FC Cartagena | Fichaje | — |
| 1 jul 2021 | Lucas Laso Gutiérrez | Real Oviedo Vetusta | Fichaje | — |
| 1 jul 2021 | Diego Kochen | Barça Cad. A | Fichaje | — |
| 1 jul 2021 | Nathan John Mark Fraser | Wolves U18 | Fichaje | — |
| 1 jul 2021 | Brooklyn Lukongola Kabongolo | Ipswich Town U23 | Fichaje | — |
| 1 jul 2021 | Lewis Miley | Newcastle U18 | Fichaje | — |
| 1 jul 2021 | Martín Adrián Satriano Costa | Inter Milan | Fichaje | — |
| 1 jul 2021 | Jon de Luis Suescun | UD Mutilvera | Cesión | — |
| 1 jul 2021 | Iker Alday Igartua | SD Eibar B | Fichaje | — |
| 1 jul 2021 | Rico Henry Mark Lewis | Man City U18 | Fichaje | — |
| 1 jul 2021 | Niccolò Pisilli | Roma U18 | 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 | Alberto Calatrava Ragull | Alboraya Juv. A | Fichaje | — |
| 1 jul 2021 | Clark Robertson | Portsmouth FC | Fichaje | — |
| 1 jul 2021 | James Harrington Trafford | Accrington Stanley | Cesión | — |
| 1 jul 2021 | Jordi Altena | Vitesse U21 | Fichaje | — |
| 1 jul 2021 | Jack Luca Hinshelwood | Brighton U18 | Fichaje | — |
| 1 jul 2021 | Marc Guiu Paz | Barça Cad. A | Fichaje | — |
| 1 jul 2021 | David López Guijarro | Mallorca Juv. A | Fichaje | — |
| 1 jul 2021 | Daniel Rodríguez Crespo | Barça Juv. B | Fichaje | — |
| 1 jul 2021 | Moussa Diarra | Atlético Malagueño | Fichaje | — |
| 1 jul 2021 | Sergio López Galache | FC Basilea | Fichaje | — |
| 1 jul 2021 | Guillaume Lino Restes | Toulouse U19 | Fichaje | — |
| 1 jul 2021 | Rayan Fofana | RC Lens U17 | Fichaje | — |
| 1 jul 2021 | Ayyoub Bouaddi | LOSC Lille Juv. | Fichaje | — |
| 1 jul 2021 | Jesús Areso Blanco | CA Osasuna | Fichaje | — |
| 1 jul 2021 | Juan González Macho | Sevilla Juv. A | Fichaje | — |
| 1 jul 2021 | Rubén Quintanilla Rodríguez | RCD Mallorca B | Fichaje | — |
| 1 jul 2021 | Oussama El Azzouzi | FC Emmen | Fichaje | — |
| 1 jul 2021 | Ibon Ignacio Sánchez Océn | Athletic Juv. A | Fichaje | — |