Chelsea striker Fernando Torres believes his side's surprise defeat to Swiss side Basel gave the Blues a wake-up call.
Jose Mourinho's side lost their opening Champions League encounter at home to Basel, but have since gone on to beat Steaua Bucharest and Schalke to climb to the top of Group E.
And Torres, who scored a brace against German side Schalke on Tuesday, has praised the way in which his side reacted to their matchday one defeat to Basel.
Speaking after Chelsea's 3-0 win over their Group E rivals, Torres said: "We are top of the group again after not the best start of the competition at home against Basel.
"Now we have two games at home, one game away, so we're in the position we wanted.
"These kind of things (defeat to Basel) are good when it happens at the beginning of the season, when the games are not crucial and we have time to fix it, like we have done now.
"When these kind of things happen at the end of the season, you lose competitions, you lose titles and it's not good. Hopefully we've learnt the lesson and it won't happen again.
"This is a young squad. New manager, new style, new players. It's not easy to settle quickly.
"We are on the way. We're improving, we're building up, we're learning as a group."
Torres is hopeful Chelsea can replicate their 2012 Champions League win - when the west London side won the prestigious trophy for the first time in their 108-year history.
"The Champions League is what Chelsea has to play; Europa League is not a competition we want to win," added Torres.
"We're in the Champions League now, we don't want to be involved in the Europa League again because we want to win the Champions League.
"First step is finish top of the group, or second, and after that we'll see. It depends on the opponents.
"Sometimes the Champions League depends as well on the draw. Sometimes you have an easy way until the semi-final or final; sometimes you have to beat the best teams and you cannot. Let's go step by step. Schalke at home and we'll see later."
Torres will be hoping his midweek display will put him in good stead to start Chelsea's encounter against Manchester City on Sunday - ahead of fellow striker Samuel Eto'o.