Chelsea lack confidence, form and fitness but will not lose to FC Copenhagen, says manager Carlo Ancelotti.The Chelsea boss, whose job is reportedly on the line following Saturday's FA Cup loss to Everton, has defiantly predicted the Blues will advance to the Champions League quarter-finals by overcoming the Danish champions.The sides face off in the first leg of their last-16 tie in the Danish capital on Tuesday, with Ancelotti desperate to keep Chelsea's European ambitions alive.The Italian boss has predicted his side can topple Copenhagen and snap their three-match losing winless streak across all competitions.''Chelsea won't go out against Copenhagen,'' Ancelotti said. ''We have a possibility to win against Copenhagen. We have to have the right pressure because we have 180 minutes to win against them.""We need to maintain a good shape, stay together and work hard together and not individually."''We need to take a result and it'll be a good to take a result on Tuesday. The Champions League is not easy but it brings a lot of motivation.""We have lost confidence in our play, we have no continuity. That is the reason for these results.""Saturday was not good, we are disappointed. But the performance was good, we worked hard for 90 minutes. We created 10 chances. We have to stay together, work hard."Ancelotti also admitted only three members of his squad are playing to their potential - John Terry, Branislav Ivanovic and goalkeeper Petr Cech."How many players are playing near the top of their level at this moment besides Cech?'' he said. ''Ivanovic, who is playing consistently. Terry. A couple are not at 100 percent fitness. Frank Lampard played well against Everton."''After the defeat against Birmingham (in November) we have lost confidence in our play and sometimes it is difficult to move on.""But we have to keep going and maintain our play, create chances and hopefully have more shot accuracy. We are not having good results and we have to do better.''