#2 Flop: David Luiz

Chelsea's defence was rather untested for the entire match except for one occasion. In fact, the home side only faced two shots on goal, one of which was a tame effort.
Andros Townsend ran through the space between Luiz and Rudiger, who were both positioned high up the pitch. They failed to communicate and the former completely missed the winger.
Neither did he sense the run, nor did he catch the pacy Townsend. Luiz didn't put his body on the line either and as a result, Kepa Arrizabalaga lost a well-deserved clean sheet.
Sarri has reiterated his side's inability to defend consistently with pure concentration, and today was another indication of the same by David Luiz.
The Brazilian should have scored once too, as he was beautifully picked out by a Willian free-kick. Although this wasn't the worst of performances if seen on an overall note, these little moments can prove to be costly.