Chelsea winger Jeremie Boga has joined Rennes on-loan.
Blues teammate Nathaniel Chalobah has also left on-loan for Napoli.
The move is Chalobah's sixth of his career having also appeared for Watford, Nottingham Forest, Middlesbrough, Burnley and Reading.
Boga was an integral member of the Blues academy's success last season, as they won the UEFA Youth League and FA Youth Cup glory, and is highly-rated at the club.