The 32-year-old is thought to have been considering a comeback to the national squad following his retirement, which came about due to the case brought against him for racially abusing Queens Park Rangers defender Anton Ferdinand last year.
"That is not my business," Sky Sports News quotes Benitez as saying. "My business is to keep him as fit as possible for every game. I only speak to him about Chelsea."
The defender made back-to-back appearances for the Blues for the first time since February by captaining the side in Sunday's 2-0 victory over Swansea City.