Disgruntled supporters piled on the misery for the former Liverpool manager, continuing the expletive-laden chants of "You're not welcome here" that have plagued his short reign, while he was also taunted - seemingly by home fans - with "You're getting sacked in the morning".
Asked if he feared he would not last very long at Stamford Bridge, Benitez - whose contract is until the end of the season - said: "I would say that it depends on the things that we can do on the pitch.
"So, if we improve on the pitch, it will be easier for everyone."
Pressed on the fact he did not sound 100 per cent sure of his position, he replied: "No, I am not 100 per cent.
"We didn't win today - that is the main thing."