Abdul Baba Rahman has lost his shirt number at Chelsea.
Rahman is currently on a season-long loan from Chelsea at Bundesliga side Schalke.
He wore the number six shirt during his first season at Chelsea.
But that has now been handed to Nathan Ake following his return to the club.
Ake was recalled from Bournemouth last week but failed to make Antonio Conte's squad for the victory over Leicester on Saturday, reports the Daily Star.