The club decided not to keep Jadon Sancho, who joined from Manchester United. Sancho plays on the left flank, and Chelsea thinks they need a player who can play on both sides. This way, they can have more options during games.
Chelsea's coach, Enzo Maresca, recently talked about the team's need for more wingers. He said they would look for players who can play on the flanks to help the team.
Chelsea is not the only team interested in Fofana. They are also considering another young player named Jamie Gittens from Borussia Dortmund.