France's LFP governing body has allegedly blocked Hakim Ziyech's last-minute transfer from Chelsea to Paris Saint-Germain due to documentation arriving late.
Chelsea beat the clock in the final minutes of the transfer window with the Blues breaking the British transfer record by signing Enzo Fernandez.
Arsenal completed the signing of midfielder Jorginho from Premier League rivals Chelsea hours before the January transfer deadline.
Chelsea forward Mykhailo Mudryk is unlikely to face a ban for using a racial slur in a social media post.
Arsenal look set to sign Chelsea midfielder Jorginho for a reported 12 million Pound deal.
Reading have brought in Cesare Casadei on loan from Chelsea until the end of the season, the club have announced.