Mamadou Sarr has officially completed a move from Strasbourg Alsace to Chelsea. The defender joins after weeks of speculation, with the transfer now confirmed by all parties. The club have made the announcement following final approval and registration, with the player set to be unveiled imminently. Chelsea faced no rival bids for the player, enabling them to negotiate directly and wrap up the deal efficiently. With only 27 goals conceded in 24 (1.12 per game), Chelsea have been one of the stronger defences in the Premier League this season.. Mamadou Sarr would be asked to keep that standard and provide dependable cover when needed. Strasbourg Alsace continue to be linked with David Datro Fofana, Aaron Anselmino and James John McAtee while Chelsea are also rumoured to be tracking Ferran Torres, Jamal Musiala and Ruben Loftus-Cheek. Follow us on Twitter @PlayerSwitchCom and get the latest Chelsea transfer news and rumours direct to your feed.