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| Transfers |
 SKN St.Pölten < > 1,840,000  Lyon |
| GZV | < | Yusuf DEMIR | W/AM | AUT | 54/55 | 2 | 02/06/03 (20) | 79 | 1.71 | 72 | SKN St.Pölten | | | | | | | | 2115 | | | |
 Parma < > 1,090,000 Marseille |
| CHN | < | Timothée PEMBÉLÉ | CB/RB | FRA | 56 | 92 | 09/09/02 (21) | 85 | | | Parma | | 4180 | | | | 0 | 0 | 1515 | 0 | +2 | |
 Ajax 11,150,000 < >  Sporting Braga |
| GEA | > | GABRIEL Fernando de JESUS | St | BRA | 67 | 85 | 03/04/97 (26) | 91 | 1.78 | 73 | Sporting Braga | 6.60 | 35860 | | | | 3 | 0 | 8255 | 2 | +1 | |
| JRA | < | Lorenzo PELLEGRINI | CM/AM | ITA | 66 | 95 | 19/06/96 (27) | 90 | 1.86 | 77 | Ajax | 7.50 | 29020 | | | | 3 | 0 | 5770 | 0 | | |
Ajax 4,000,000 < >  Liverpool |
| FRN | > | Diogo José Teixeira da Silva, JOTA | LW/St | POR | 65 | 95 | 04/12/96 (27) | 92 | 1.78 | 71 | Liverpool | 6.40 | 22000 | | | | 2 | 0 | 5000 | 1 | +4 | |
| AQZ | < | Arkadiusz MILIK | CS | POL | 64 | 90 | 28/02/94 (29) | 93 | 1.89 | 78 | Ajax | 6.57 | 16380 | | | | 2 | 0 | 4415 | 4 | | |
| PLQ | > | Olivier GIROUD | CS | FRA | 67 | 99 | 30/09/86 (37) | 88 | 1.90 | 85 | Liverpool | | 34060 | | | | 3 | 1 | F/t | 0 | +1 | |
| WOJ | < | Andrea BELOTTI | CS | ITA | 64 | 95 | 20/12/93 (30) | 91 | 1.81 | 72 | Ajax | | 18880 | | | | 1 | 0 | 4100 | 0 | | |
 Valladolid < > 2,720,000 Barcelona |
| PXS | < | David DE GEA Quintana | Gk | ESP | 65 | 2 | 07/11/90 (33) | 88 | 1.92 | 82 | Valladolid | | | | | | | | 2350 | | | |
| 70,000 < > Barcelona |
| YJA | > | Reuell WALTERS | RB/RM | ENG | 41 | 80 | 16/12/04 (19) | 93 | | | Barcelona | | 270 | | | | 0 | 0 | 160 | 0 | Y | |
| 500,000 < > Barcelona |
| SOO | > | Aleksandar PAVLOVIC | DM | GER | 50 | 76 | 03/05/04 (19) | 90 | | | Barcelona | | 1020 | | | | 0 | 0 | 745 | 0 | Y | |
| 450,000 < > Real Sociedad |
| JAV | > | IKER BRAVO Solanilla | St | ESP | 45 | 77 | 13/01/05 (19) | 92 | | | Real Sociedad | | 860 | | | | 0 | 0 | 620 | 0 | | |
| Rennes 2,175,000 < > Villarreal |
| RQW | > | Hamari TRAORÉ | RWB | MLI | 64 | 99 | 27/01/92 (32) | 91 | 1.75 | 64 | Villarreal | | 18280 | | | | 0 | 0 | 1715 | 0 | +1 | |
 FC Dallas 7,535,000 < > Sampdoria |
| FAV | > | Christian PULISIC | W/WS | USA | 65 | 96 | 18/09/98 (25) | 82 | 1.73 | 63 | Sampdoria | | 21400 | | | | 0 | 0 | 5625 | 0 | +1 | |
| Released |
| OEZ | 16 | Adam OBERT | CB | SVK | 58 | 2 | 23/08/02 (21) | 80 | | | Birmingham City | | | | | | | | 2030 | | | |
| HUI | 16 | Rafal GIKIEWICZ | Gk | POL | 61 | 1 | 26/10/87 (36) | 90 | 1.90 | 82 | Polonia Warszawa | | | | | | | | 850 | | | |
| Loan callbacks |
| FSJ | - | Alex MERET | Gk | ITA | 66 | 97 | 22/03/97 (26) | 91 | 1.90 | 77 | Sporting Braga | 6.95 | 28020 | | | | 0 | 0 | 4545 | 0 | | |
| XKW | - | Joris CHOTARD | CM | FRA | 63 | 97 | 24/09/01 (22) | 91 | | | Marseille | 7.12 | 16240 | | | | 2 | 0 | 5580 | 3 | | |
| MMO | - | Hugo EKITIKÉ | St | FRA | 62 | 94 | 20/06/02 (21) | 90 | | | Marseille | 6.50 | 11360 | | | | 8 | 0 | 6215 | 0 | | |
| IIF | - | NUNO Alexandre Tavares MENDES | LWB | POR | 64 | 94 | 19/06/02 (21) | 93 | 1.83 | 70 | Sporting Braga | 7.50 | 20280 | | | | 0 | 0 | 4795 | 0 | | |
