The source indicates that defender Wesley Fofana will not be expected to play in consecutive matches until the beginning of the new year.
The Blues want to ensure that he is 100 percent recovered from the knee injury that kept him out for so long last season.
Fofana is fully fit and does start in the Premier League, but he will not be used in any midweek games.
Fofana has yet to feature in the Europa Conference League or the Carabao Cup.