Sterling has made 81 appearances for Chelsea since joining from Manchester City for £50m in July 2022.
“I spoke with Raheem one-on-one the day before City and I explained him exactly the situation. I didn’t see Raheem after the game,” Maresca said.
“He is training apart, as I said, but in case I sit with Raheem, I will tell him exactly the same things that I already told him. I don’t have anything new to tell him because I was quite clear.”
Sterling and Chilwell are among a host of players now deemed surplus to requirements at Stamford Bridge and could be sold before deadline day.
Maresca is frustrated by persistent accusations that he is working with a 42-man squad.
“I’m not working with 42 or 43 players. You like to say we have 42 or 43 players but more than 15 players are training apart, they are not with the team,” said the former Leicester City manager.
“I don’t see them, so it’s not a mess like it looks from outside. Absolutely not.”
The English summer transfer window closes on August 30 and Chelsea could allow several players to depart as they seek a more manageable squad size.
“As I said many times, many things can happen in the last 10 days, the last week, so we’ll see,” Maresca said.
Reece James will miss the Servette game because of injury, and Joao Felix has not been registered in time to be involved following his £45m move from Ateltico Madrid.
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