Only eleven players can start a game, and Chelsea have a squad full of players with youngsters who are eager to break through to the first team.
Chelsea boss Antonio Conte has revealed that commitment and the desire to fight for a chance are the two keys necessary to make his team.
He said in his press conference on Tuesday: “The most important thing in the training session is to always show great commitment and desire to fight for a chance to play.
“Every single player must have this desire and will to learn, improve and put yourself in contention. That’s the best way for every single player, to improve himself and show me a great desire.
“For sure, when you have 16 or 17 seniors players, if everyone shows you great commitment you have to make a decision because you can only play with 11.”