Jose Mourinho warned Chelsea that firing him would be a major mistake following their 3-1 loss to Southampton.
Chelsea took an early lead on a free kick from Willian, but Saints scored three unanswered.
"Look, I think you know me and I think you know I don't run away from responsibilities," he told Sky Sports. "Because we are in such a bad moment we shouldn't be afraid to be honest.
"The referees are afraid to give decisions to Chelsea. Once more we don't get the penalty at a crucial moment in the game.
"The penalty in this game is crucial because my team, at the moment, the first negative thing that happens, they collapse.
"The penalty was a giant penalty, and after that the team lost even more confidence."
Mourinho said he would not "run away" and warned: "If the club wants to sack me they have to sack me, because I don't run away from my responsibilities."
However, he said it was "a crucial moment in the history of this club" and that owner Roman Abramovich would be making a major mistake if he decided to dismiss him for a second time.
"It is a crucial moment in the history of this club because if they sack me they sack the best manager this club has ever had," he added. "The message is that the results are the fault of the manager.
"This is a moment for everybody to assume their responsibilities and stick together."