The Blues' three big summer signings are all included but World Cup stars Eden Hazard, Romelu Lukaku, Thibaut Courtois, Oscar, Ramires and Andre Schurrle are omitted.
Youngsters Patrick Bamford, Nathan Ake, Jeremie Boga, Lewis Baker, Nathaniel Chalobah and Izzy Brown have also been named in the 26-man group to travel to Austria.
But Eden Hazard, Romelu Lukaku, Thibaut Courtois, Oscar, Ramires and Andre Schurrle all have been omitted after their extended World Cup campaigns.
January signing Mohamed Salah has also traveled with the squad after receiving confirmation that he will not have to return to Egypt for military service.
Chelsea kicks off its European tour against Austrian Bundesliga side RZ Pellets before taking on NK Olimpija Ljubljana, Vitesse Arnhem, Werder Bremen, Ferencvaros and Real Sociedad.