The Ivory Coast international scored the decisive goal in the west London side's 1-0 win in Portugal, prodding home in the 75th minute of the quarter-final first leg. Kalou, who has been with the Stamford Bridge outfit since joining from Feyenoord in 2006, could leave at the end of the campaign when his contract expires.
He said: "I know my contract ends at the end of the season. For me the most important thing is not to fight for a new deal, it is just to enjoy myself with the team and play the best I can and help the team win the games we have left to play. As long as I do that, I am fine and I am happy with myself."
Last year Kalou said he wanted guarantees of more game time from Chelsea before penning a new deal.
The winger was little more than a bit-part player under previous manager Andre Villas-Boas, although he has been given a more important role under interim manager Roberto Di Matteo.
The Italian has overseen an impressive turnaround in his short time at the Chelsea helm and Kalou has praised the new attitude at the club.
"I think the idea is to give an opportunity for everyone to show that they want to play for the club and give 100%," he said. "That is how you get everybody behind you and that is how you get the team to work together."
Such has Di Matteo's impact been that Chelsea are on the brink of the Champions League semi-finals just weeks after their European campaign seemed in tatters.
Kalou was proud to net Tuesday night's all-important goal and believes anything is possible in this season's competition.
"It means a lot to me to score," he said. "I am happy to be in the team, playing games and to score. I still think I can improve and if I can help teams to win games, I'd be delighted to do that. Anything is possible. We have the team for it, we have the players for it. I believe there is no reason why we could not win the Champions League."
Source: PA
Source: PA