Chelsea are set to sign French defender Mamadou Sarr from partner club Strasbourg.

The £11.9m deal for the 19-year-old central defender, who has played just 14 times for Strasbourg, is with a view for him to join in the summer.

It represents the first permanent transfer into Stamford Bridge from Strasbourg, clubs owned by Todd Boehly and Clearlake Capital under the BlueCo umbrella.

Ligue 1 Strasbourg will bank a quick £3.4m profit having only signed Sarr from Lyon for £8.5m in the summer.