Lyon have completed the signing of Chelsea's Bertrand Traore in a deal worth up to £16million.
The 21-year-old joins the French side on a five-year deal for an initial £8.8m after an impressive 2016-17 campaign on loan with Ajax, where he scored 13 goals in all competitions.
Traore was a key member of Peter Bosz's side as they made it to the Europa League final before losing 2-0 to Manchester United.