| Fecha | Jugador | Llega a | Tipo | Precio |
|---|---|---|---|---|
| 1 jul 2021 | Jesús Rodríguez | Betis Fútb.base | Fichaje | — |
| 1 jul 2021 | Abdul Abdulmalik | Millwall FC U21 | Fichaje | Sin coste |
| 1 jul 2021 | Óscar Ureña García | Girona FC B | Fichaje | — |
| 1 jul 2021 | Jeremiaha Maluze | SG Unterrath U19 | Fichaje | — |
| 1 jul 2021 | Andrea Natali | FC Barcelona Youth | Fichaje | — |
| 1 jul 2021 | Ethan Mbappé | Paris Saint-Germain U17 | Fichaje | — |
| 1 jul 2021 | Mika Godts | KRC Genk U18 | Fichaje | — |
| 1 jul 2021 | Lamine Cissé | AS Nancy-Lorraine | Fichaje | Sin coste |
| 1 jul 2021 | Luca Marianucci | Empoli U18 | Fichaje | — |
| 1 jul 2021 | Viktor Damjanic | HNK Sibenik U19 | Fichaje | Sin coste |
| 1 jul 2021 | Victor Parada González | San Ignacio | Fichaje | — |
| 1 jul 2021 | Chema Andrés | R. Madrid Juv.C | Fichaje | — |
| 1 jul 2021 | Nathan Buayi-Kiala | LOSC Lille U19 | Fichaje | — |
| 1 jul 2021 | Ruben Müller | SC Freiburg U17 | Fichaje | — |
| 1 jul 2021 | Mamadou Diop | FC Chambly Oise | Fichaje | — |
| 1 jul 2021 | Jenson Metcalfe | Everton FC U18 | Fichaje | Sin coste |
| 1 jul 2021 | Alberto Moleiro | UD Las Palmas | Fichaje | — |
| 1 jul 2021 | Dominik Weixelbraun | LASK Amateure OÖ | Fichaje | Sin coste |
| 1 jul 2021 | Nils Eggens | Groningen U18 | Fichaje | — |
| 1 jul 2021 | Josué | Legia de Varsovia | Fichaje | Sin coste |
| 1 jul 2021 | Iñaki González | Badajoz Juv. A | Fichaje | — |
| 1 jul 2021 | Pelayo González Rey | Real Oviedo Vetusta | Fichaje | — |
| 1 jul 2021 | Miguel Rubio | Getafe CF | Fichaje | — |
| 1 jul 2021 | Bryan Lasme | Arminia Bielefeld | € 1M | €1.0M |
| 1 jul 2021 | Anes Krdzalic | GNK Dinamo Zagreb U19 | Fichaje | — |
| 1 jul 2021 | Olaf Gorter | Ajax Amsterdam U17 | Fichaje | — |
| 1 jul 2021 | Mujaid Sadick | KRC Genk | Fichaje | €1.7M |
| 1 jul 2021 | Sergi Enrich | Sin equipo | Fichaje | — |
| 1 jul 2021 | Jonas Jensen-Abbew | FC Nordsjælland | Fichaje | — |
| 1 jul 2021 | Joel Ideho | Arsenal U21 | Fichaje | — |
| 1 jul 2021 | Víctor Muñoz | Real Madrid U19 | Fichaje | — |
| 1 jul 2021 | Salko Hamzic | AKA Red Bull Salzburg U18 | Fichaje | Sin coste |
| 1 jul 2021 | Eaden Roka | AKA Rapid Wien U15 | Fichaje | Sin coste |
| 1 jul 2021 | Charles-André Raux-Yao | Racing Club de France | Fichaje | Sin coste |
| 1 jul 2021 | Christian Gabriel Oliva Giménez | Cagliari Calcio | N/A | N/A |
| 1 jul 2021 | Cameron Archer | Aston Villa FC | Fichaje | — |
| 1 jul 2021 | Mikel Jauregizar | Athletic Bilbao U19 | Fichaje | — |
| 1 jul 2021 | Issa Doumbia | UC AlbinoLeffe | Fichaje | — |
| 1 jul 2021 | Emil Bohinen | CSKA Moscow | Fichaje | — |
| 1 jul 2021 | Gabriel De Vuyst | San Franc Juv.A | Fichaje | — |