Thomas Tuchel has established a watertight defensive game since taking charge of Chelsea in January 2020.
The Blues have developed into a complete outfit under his tutelage, but their ability to keep clean sheets on a regular basis has been central to their biggest victories.
This summer, Tuchel could be about to lose three of his defenders due to expiring contracts, with Antonio Rudiger, Andreas Christensen and Cesar Azpilicueta tipped for moves away from Stamford Bridge.
