Andre Villas-Boas is confident Chelsea will qualify the last 16 of the Champions League, despite Wednesday's 2-1 defeat by Bayer Leverkusen.
The Blues must win or keep a clean sheet in their final group game against Valencia if they are to progress.
The Chelsea boss said: "It's in our hands to qualify. It's a game at home and we expect to do our job.
"That's our responsibility and we don't want to let the fans down. We will need Stamford Bridge completely behind us."
Wednesday's 2-1 defeat by Bayer Leverkusen continued Chelsea's poor run of form.
They have now lost four of their last seven matches, are 12 points behind Manchester City in the Premier League and joint second in Champions League Group E, with their fate resting on their final game.
Villas-Boas admitted confidence among his players was low and said his key task now is to lift them.
The 34-year-old Portuguese added: "This is when players expect the manager to inspire them. That's my job, my task, to inspire these people and motivate these people to change our faith.
"We need to get the focus and concentration right."
Chelsea now have Premier League matches at home to Wolves on Saturday and at Newcastle a week later, with a Carling Cup quarter-final tie against Liverpool at Stamford Bridge sandwiched in between. Then comes the crunch game against Valencia in the Champions League on 6 December
A win in Leverkusen would have secured Chelsea's progress from Group E and they looked well-placed to achieve that after Didier Drogba had given them a second-half lead.
However, substitute Eren Derdiyok headed Leverkusen level with 17 minutes remaining and, in the final minute of the match, Manuel Friedrich headed in a winner for the German side.
"It was an unfair result, it was heading to a draw, we had our fair share of chances, it wasn't good football by either team, which was a pity," said Villas-Boas.