Raheem Sterling and Ben Chilwell have not been included in Chelsea’s squad for Thursday’s Conference League play-off first leg against Servette.
The Blues will be campaigning in the UEFA Conference League after they finished outside the top 6 in last season’s English Premier League.
Sterling is considering all of his options after he was left out of Sunday’s Premier League opener against Manchester City.
Chelsea boss Enzo Maresca said last week that Chilwell is free to leave the club.