Chelsea manager Andre Villas-Boas has said his side's current position of fifth in the Premier League is not good enough and "piles pressure" on him.
The Portuguese said West Bromwich Albion fully deserved their 1-0 win over the Blues at The Hawthorns and were "superior in every minute".
Villas-Boas added: "It's not been good enough for some time. We're fifth and if that is the case, something's wrong.
"Every defeat piles more pressure on any Chelsea manager."
And he added: "We don't win enough and that does not make us proud."
Chelsea's latest defeat means they are three points behind fourth-placed Arsenal in the table and now face a crucial two weeks in their bid to salvage their season.
They face Birmingham in an FA Cup fifth-round replay on Tuesday and must overcome a 3-1 first-leg deficit against Napoli in the Champions League if they are to progress in Europe.
And a league run of just three wins in their last 12 games has done nothing to stop the mounting speculation that Villas-Boas will be sacked.
"We have responsibilities to the fans and the club and we did not perform," he said.
But Villas-Boas insisted it did not make any difference to his position if the club's owner Roman Abramovich gave him his public support.
"At the moment we just have to go on with our job and everyone must do better, players and manager for sure on that one," he added.
"We have to improve and there is no need for the owner to back us after such a poor display. Am I the right man for the job? Yes. I wouldn't have taken it if I didn't think that.
"You have to ask the owners not me [if I will get another chance]. We just have to get on with the job."
Villas-Boas offered no excuses for his side's performance against West Brom.
"West Brom were superior in every minute and incident of the game," he said.
"You have to give credit where it belongs and they were far, far superior today. Our first half was very, very poor. We had a couple of decent chances that could have helped us gain an extra emotion and motivation if we had scored.
"We got behind their defence but we didn't take [the chances]. West Brom got what they deserved from the chances they created which were far more than ours. They came out with a deserved three points.
"We wanted to build on a win that was well-taken against Bolton but we didn't manage it and we don't improve our run. We go on now to a knockout competition where we have to be much, much better than this."
Villas-Boas said the Blues must quickly turn their focus to Tuesday's FA Cup replay.
"In football there is joy and there is pain, and there is another chance," he said.
"We have another chance against Birmingham and we have to do much better against them if we want to go through."