Maurizio Sarri criticized Chelsea's mentality following their 2-0 loss to Arsenal.
"It seems we really struggle to get ourselves up for these games. I'm really angry about the approach that we adopted today. You can find yourself in difficulties from time to time, but we need to react to those difficulties a lot better than we did today. It was the same in our game against Tottenham [lost 3-1]. We thought we'd overcome that problem. I don't mind losing, but I don't like losing in this manner."
Sarri had commented on Chelsea's lack of mentality earlier in the season.
Chelsea have lost 5 times in their last 16 matches after going the first 18 matches of the season unbeaten.