Roberto Di Matteo has claimed Chelsea need to produce "a perfect game" in their Champions League clash with Shakhtar Donetsk.
Blues boss Di Matteo repeated his mantra from last season's stunning upset of Barcelona ahead of Wednesday night's crunch Group E showdown at Stamford Bridge and he was under no illusions about the task facing his side against opponents who completely outplayed them in the reverse fixture two weeks ago.
Admitting it was time his players played like European champions after taking just four points from their opening three matches, Di Matteo said: "We need to be at our best. We need a perfect game tomorrow night. Every individual player going on the pitch has to perform at the highest of their ability."
He added: "It's important we start well and get the crowd behind us and draw confidence from a good start."
Di Matteo said ahead of last season's semi-final triumph over Barca that Chelsea needed to produce two "perfect" performances. Their 1-0 home victory over the defending champions was one of several they pulled out of the fire at Stamford Bridge, where they also delivered crucial wins over Napoli, Benfica and Valencia.
Di Matteo said: "There are some comparisons certainly to last season, when we had must-win games. Tomorrow is another like that. Fortunately, we have players with the experience who have been through that before."
Di Matteo refused to contemplate the consequences of failure on Wednesday, despite the inevitable questions about what it would mean for his own future. Asked if being the first Champions League holders not to reach the knockout stages would taint May's extraordinary triumph, he said: "I'm not thinking about that.
"I really believe this club deserves whatever it can achieve. That's my position. I work here for the club and the players. It's not about me. I think it's important for the club to have a successful campaign. That means we need to win tomorrow."
Even that is unlikely to halt speculation Abramovich could replace him with Pep Guardiola at any time but Di Matteo insisted he was master of his own fate.
He said: "From day one, the speculation has always been in the papers, so it doesn't affect me too much. I have my own destiny in my hands and the club and the owner are behind it."
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