| P | # | Player | Born | Height | Weight | Contract | |
|---|---|---|---|---|---|---|---|
| D | Nikola Gulan | 1989-03-23 | 183 | 72 | 2020-12-31 |
| Date | Player | From | To | Status | Src |
|---|---|---|---|---|---|
| 30.Jun | Jean Butez (GK) | Royal Excel Mouscron | LOSC Lille Métropole | Confirmed | |
| 30.Jun | Taiwo Awoniyi (F) | Royal Excel Mouscron | Liverpool FC | Confirmed | |
| 30.Jun | Matej Delac (GK) | Royal Excel Mouscron | Chelsea FC | Confirmed | |
| 26.Aug | Noë Dussenne (D) | Royal Excel Mouscron | FC Crotone | Confirmed | |
| 2.Jul | Tristan Dingomé (M) | Royal Excel Mouscron | ES Troyes AC | Confirmed | |
| 28.Jan | Alexandre Coeff (D) | Udinese Calcio | Royal Excel Mouscron | Confirmed | |
| 13.Jun | Andreas Granskov (F) | FC Nordsjælland | Royal Excel Mouscron | Confirmed |