| Fecha | Jugador | Llega a | Tipo | Precio |
|---|---|---|---|---|
| 1 jul 2021 | César Palacios | Real Madrid U18 | Fichaje | — |
| 1 jul 2021 | Andreas Hermansen | AC Horsens U19 | Fichaje | Sin coste |
| 1 jul 2021 | Emiliano Buendía | Aston Villa FC | Fichaje | €38.4M |
| 1 jul 2021 | Pablo Sánchez Flores Casanova | U. Adarve Juv.A | Fichaje | — |
| 1 jul 2021 | Hugo Novoa | RB Leipzig | Fichaje | — |
| 1 jul 2021 | Taylor Gardner-Hickman | West Bromwich Albion | Fichaje | Sin coste |
| 1 jul 2021 | Matías Soulé | Juventus Next Gen | Fichaje | — |
| 1 jul 2021 | Oumar Ngom | Niort B | Fichaje | — |
| 1 jul 2021 | Andraz Sporar | Sporting de Lisboa | N/A | N/A |
| 1 jul 2021 | Konrad de la Fuente | Olympique de Marseille | Fichaje | €3.0M |
| 1 jul 2021 | Martin Pecar | Eintracht Fráncfort | Fichaje | — |
| 1 jul 2021 | Julien Lomboto | Racing Strasbourg B | Fichaje | — |
| 1 jul 2021 | Pablo Arriaza | Málaga Juv. A | Fichaje | — |
| 1 jul 2021 | Nikolaus Feldhofer | AKA Red Bull Salzburg U16 | Fichaje | Sin coste |
| 1 jul 2021 | Joachim Kayi Sanda | FC Valenciennes U17 | Fichaje | Sin coste |
| 1 jul 2021 | Leon Klassen | WSG Tirol | Fichaje | Sin coste |
| 1 jul 2021 | Marius Bülter | FC Schalke 04 | N/A | N/A |
| 1 jul 2021 | Morato | SL Benfica | Fichaje | Sin coste |
| 1 jul 2021 | Arouna Sangante | Le Havre AC | Fichaje | Sin coste |
| 1 jul 2021 | Mathys de Carvalho Soares | Olymp. Lyon U17 | Fichaje | — |
| 1 jul 2021 | Leandro Morgalla | TSV 1860 München U19 | Fichaje | Sin coste |
| 1 jul 2021 | Raúl Chasco Ruiz | CD Basconia | Fichaje | — |
| 1 jul 2021 | Maximilian Rohr | Hamburgo SV | Fichaje | — |
| 1 jul 2021 | Andrés Rodríguez | Villarreal CF C | Fichaje | — |
| 1 jul 2021 | Darko Gyabi | Man City U23 | Fichaje | — |
| 1 jul 2021 | Shaquil Delos | AS Nancy-Lorraine | Fichaje | Sin coste |
| 1 jul 2021 | Alberto del Moral | Villarreal CF B | Fichaje | €300k |
| 1 jul 2021 | Alejandro Mestanza | Majad. Juv. A | Fichaje | — |
| 1 jul 2021 | Christos Alexiou | Atromitos Athens U19 | Fichaje | — |
| 1 jul 2021 | Jobe Bellingham | Birmingham City U18 | Fichaje | — |
| 1 jul 2021 | Martin Georgiev | Slavia Sofia | Fichaje | — |
| 1 jul 2021 | Diego Hormigo | Sevilla FC U19 | Fichaje | — |
| 1 jul 2021 | Marc Bombardó | G. Manresa JuvA | Fichaje | — |
| 1 jul 2021 | Jack Moylan | Wexford FC | Cesión | Préstamo / cesión |
| 1 jul 2021 | Johan Manzambi | Servette M-17 | Fichaje | — |
| 1 jul 2021 | Juan Soriano | CD Tenerife | Fichaje | — |
| 1 jul 2021 | Reda Belahyane | OGC Niza B | Fichaje | — |
| 1 jul 2021 | Michael Brouwer | FC Emmen | Cesión | — |
| 1 jul 2021 | Yamano Olfers | Telstar Juv. | Fichaje | — |
| 1 jul 2021 | Rodrigo Real | Varzim SC Sub-15 | Fichaje | — |