Andre Villas-Boas bemoaned his side's worst display of the season after a 2-0 defeat at Everton increased the pressure on the Chelsea manager.
Villas-Boas, whose side slipped out of the Barclays Premier League top four after a fourth game without a win, was even goaded by his own fans during the 2-0 loss at Goodison Park, with visiting supporters chanting 'You don't know what you're doing' when the Portuguese substituted Michael Essien in the second half.
Villas-Boas, whose predecessor Carlo Ancelotti was sacked at the same ground last year, said: "I think today was one of our worst games of the season, if not the worst."
Copyright (c) PA Sport 2012, All Rights Reserved.
