Luiz Felipe Scolari claimed Chelsea 'did not play very well' despite opening their Champions League campaign with a 4-0 rout of Bordeaux.
Frank Lampard and Joe Cole fired the Blues into a first-half lead before further late strikes from Florent Malouda and Nicolas Anelka completed the scoring.
But afterwards Scolari was far from content with the performance in his first Champions League game at the Stamford Bridge helm.
He said: "We know that we made many mistakes in the second half.
"We tried to attack without the ball and with no good connections, but most important for us is the result.
"It is important to start with a win because in this competition you never know what will happen.
"You see that Cluj beat Roma. That is a warning for us for the next game.
"It is important to win and if you play well that is better, but today we did not play very well.
"They make many mistakes when they have the ball. When you play in the Champions League and are winning 2-0 at half-time you need to work the ball and control the game.
"You don't need to win 5-0, it is still the same three points."