Chelsea chief executive Peter Kenyon insists Jose Mourinho's side have yet to reach their full potential as they prepare for Sunday's showdown with Manchester United at Old Trafford.
The champions are three points adrift of United at the top of the Barclays Premiership and their clash with Sir Alex Ferguson's side is already being billed as a possible title decider.
Both sides lost in the Champions League in midweek - Chelsea going down 1-0 to Werder Bremen and United losing by the same score to Celtic.
But Kenyon, speaking at the launch of the revamped Chelsea website, was keen to play down suggestions the game will ultimately decide the destination of the title and stressed that, as far as he was concerned, the Blues have yet to reach their full potential this term.
Kenyon said: 'Sunday is not the deciding the game, as much we try to build it up. I think we still have a long way to go in the season.
'I think the team is the best team we've had in the three years I've been here. In depth, I think the squad is tremendous, and I don't actually think we've seen the best of Chelsea at this stage in the season.
'With players coming off the World Cup, disruption in terms of getting the team together, and the stop-start nature of the season, I think we have the best of Chelsea to come. We're very positive and very proud of the team we've got.'
Chelsea have made light of injury concerns to midfielder Michael Ballack and 14-goal striker Didier Drogba.
Both players underwent further treatment on their calf and ankle injuries respectively today and are expected to be fit enough to face United.
Chelsea's defeat to Bremen was their first in the Champions League this season but they still qualified for the last 16.
Mourinho's side now need to beat bottom club Levski Sofia to go into the knockout stages as Group A winners.
Chelsea were never at their best against a determined Bremen side but captain John Terry hit back at suggestions they were too relaxed.
The England skipper was booked for dissent in the second half and will miss their game with Sofia.
Terry was happy with Chelsea's effort and endeavour against Bremen but admitted that it was disappointing to lose the game ahead of their all-important clash with United on Sunday.
'We came to Bremen to win the game. If we had come to lose we'd have sent the reserves. But we owe it to the fans.
'We put in a performance but without getting the result - but we are through. We wanted to come here and win and make sure and not depend on other results or goal differences.
'It's disappointing to concede goals like that but we must work on that for the future. I thought we soaked up a load of their pressure but it's still disappointing.
'It's disappointing to lose a game going into a big one. It's the same for both of us now.
'We have lots of strong characters and we'll see how we bounce back on Sunday.'