Chelsea boss Jose Mourinho says his senior players will be key in their Champions League tie with Galatasaray.
Some of his squad are yet to taste knockout competition in the European Cup, as Chelsea were eliminated at the group stage last term before responding to win the Europa League.
"That's exactly why they belong to this project," Mourinho said:
"You could say this project is a project for the future. We only want to do this project with young players that have a 10-years future.
"No. We decided clearly from the beginning that the best way to develop the other guys is to have a nucleus of players like they are.
"They are important in the evolution of the team too.
"These older players in Chelsea they have a big history in the Champions League. They've experienced everything in the Champions League.
"The most important thing for us in the Champions League is to have a feeling of knockout Champions League for the players that never did it.
"This is the first time that they play, some of them. Oscar and Hazard and these kind of guys."
