There was something very worrying about this latest Chelsea setback. It was not just the fact that they extended a miserable run to just one win in their last seven Premier League matches and recorded a fourth straight game without victory.
Not even the nature of a 1-1 draw at Brighton, which was so devoid of energy or imagination. Rather, it was the reaction of Thomas Tuchel, who cut the figure of a beaten man, left to count the cost of yet more dropped points as what started as a mid-season slumps now veers towards a crisis.