Didier Drogba is slowly getting back to full fitness and form since the arrival of interim boss Guus Hiddink.
The Ivorian scored the only goal in Tuesday's victory over Portsmouth and Hiddink was delighted to see him score such an important goal.
"He is very happy with his goal. He knows he has not scored many goals this season," said Hiddink.
"It gets rid of a bit of tension. When a player is playing in that position and not scoring, then it comes to such an emotional explosion.
"If you are a striker you like to score. They live to score and to assist."
Hiddink added that he is happy with the mindset of the players at Stamford Bridge.
"What is good in this team, is that they react when there are difficulties," added Hiddink.
"Many players react in a way I normally don't like but this team is not happy when things are not going well and they make an extra effort to get their rewards.
"I notice there is a desire to have success and we have some key players who are demanding a lot from themselves and also from the other ones, which is key for big players with a big status."