"First of all, he's a good player, he's a talent. The club has known him for two years. He can play in different positions with us, on the inside, as a nine, on the outside," said Maresca of Felix, before addressing the issue of Chelsea's large squad.
"The task of any coach is to keep them all happy, but it's almost impossible. Only 11 will play. It's almost impossible to keep them all happy. I always try to be honest with all of them.
"The noise is greater out there because I've been working with 21 or 22 players since we returned from the United States. I'm not working with 42 players, more than 15 players are training separately," said Maresca.
Maresca also made it clear that issues such as contract length are not his concern.
"They can even have 20-year contracts. It's none of my business, I don't care," he said, before also addressing the issue of Raheem Sterling, who was left out of the squad for the opening day of the Premier League season.
"Sterling will get zero minutes here," he added.
