| Fecha | Jugador | Llega a | Tipo | Precio |
|---|---|---|---|---|
| 1 jul 2021 | Orphé Mbina | Beauvais | N/A | N/A |
| 1 jul 2021 | Ivan Pavlic | Académica de Coimbra U23 | Fichaje | Sin coste |
| 1 jul 2021 | Mikel Goti | Bilbao Athletic | Fichaje | — |
| 1 jul 2021 | Thierry Lutonda | RKC Waalwijk | Fichaje | Sin coste |
| 1 jul 2021 | Darwin Soylu | VfL Wolfsburg Youth | Fichaje | — |
| 1 jul 2021 | Kofi Amoako | VfL Wolfsburg U17 | Fichaje | — |
| 1 jul 2021 | Raúl Torrente | Granada CF | Fichaje | — |
| 1 jul 2021 | Nico Williams | Athletic Club | Fichaje | — |
| 1 jul 2021 | Herba Guirassy | FC Nantes U17 | Fichaje | Sin coste |
| 1 jul 2021 | Patrick Sequeira | Real Unión Club | N/A | N/A |
| 1 jul 2021 | Fábio Cardoso | FC Oporto | Fichaje | €2.2M |
| 1 jul 2021 | Aboubakary Koita | Sint-Truidense VV | Fichaje | — |
| 1 jul 2021 | Niko Kovač | Eintracht Frankfurt U17 | Fichaje | — |
| 1 jul 2021 | Marcus Holmgren Pedersen | Feyenoord | Fichaje | €2.0M |
| 1 jul 2021 | Unai Hernández | Girona FC U19 | Fichaje | — |
| 1 jul 2021 | Noa Lang | Club Brugge | Fichaje | — |
| 1 jul 2021 | Nicola Zalewski | AS Roma | Fichaje | — |
| 1 jul 2021 | Manu Morlanes | UD Almería | Fichaje | €3.0M |
| 1 jul 2021 | Luís Silva | Varzim SC | Fichaje | — |
| 1 jul 2021 | Gorby | SC Braga B | Fichaje | — |
| 1 jul 2021 | Ismael Salguero Lobato | Sevilla FC C | Fichaje | — |
| 1 jul 2021 | Bruno Ogbus | Grasshopper Club Zürich U18 | Fichaje | — |
| 1 jul 2021 | Simone Canestrelli | FC Empoli | Fichaje | — |
| 1 jul 2021 | Juan Miranda | Real Betis Balompié | Fichaje | — |
| 1 jul 2021 | Alessandro Circati | Parma Primavera | Fichaje | — |
| 1 jul 2021 | Keito Nakamura | LASK | Fichaje | — |
| 1 jul 2021 | Sergi Torner | CD Castellón U19 | Fichaje | — |
| 1 jul 2021 | Eliesse Ben Seghir | AS Monaco U19 | Fichaje | — |
| 1 jul 2021 | Thierno Barry | FC Sochaux B | Fichaje | — |
| 1 jul 2021 | Tiquinho Soares | Olympiacos El Pireo | Fichaje | Sin coste |
| 1 jul 2021 | Mátyás Kovács | MTK Budapest II | Fichaje | Sin coste |
| 1 jul 2021 | Oliver Scarles | West Ham United U18 | Fichaje | Sin coste |
| 1 jul 2021 | Jorge Moreno | Rayo Vallecano | Fichaje | — |
| 1 jul 2021 | Giorgi Kvilitaia | APOEL FC | Fichaje | €600k |
| 1 jul 2021 | Jakub Markovic | FK Pardubice | Cesión | — |
| 1 jul 2021 | Benja Domínguez | Gimnasia II | Fichaje | — |
| 1 jul 2021 | Stefan Bajčetić | Liverpool FC U18 | Fichaje | — |
| 1 jul 2021 | Tiernan Brooks | Notts County | Fichaje | Sin coste |
| 1 jul 2021 | Alex Camacho | Vélez CF | Fichaje | — |
| 1 jul 2021 | Romano Postema | FC Groningen | N/A | N/A |