Antonio Conte admits Chelsea risk another season of mid-table mediocrity if they fail to improve their performances after Saturday's humiliation against Arsenal.
Chelsea found themselves 3-0 down inside 40 minutes at the Emirates Stadium as a rampant Arsenal capitalised on a series of defensive mistakes, and the visitors failed to register a shot on target until the 82nd minute.
The result was Chelsea's second loss to a Premier League top-four rival in a week after last Friday's 2-1 defeat against Liverpool at Stamford Bridge, leaving them eighth in the table after six matches.
A defence that has conceded 13 goals in eight games in all competitions is a particular cause for concern.