Kai Havertz has confessed Chelsea were "not good enough" in their 4-1 defeat to Brighton on Saturday afternoon.
Graham Potter's 10th match in charge of the Blues turned out to be his first defeat as head coach. Ironically, the 47-year-old's first loss was at the club he left to join Chelsea last month.
Leandro Trossard struck early on for the hosts down at the Amex Stadium before own goals from both Ruben Loftus-Cheek and Trevoh Chalobah saw Chelsea go into the half-time break 3-0 down. Havertz responded for the Blues in the second period but Pascal Gross restored Brighton's three-goal lead late on to compile more misery on Chelsea.