The players have gone to join their national teams
The international break has started with nine Zenit players heading to join their national teams.
Wilmar Barrios will join Colombia to tour the United States where they will play two friendly matches against Guatemala in New York on 24 September and Mexico in Santa Clara on 27 September.
Dejan Lovren has been called up to the Croatia squad for the UEFA Nations League matches against Denmark in Zagreb on 22 September and Austria in Vienna on 25 September.
Nuraly Alip is with Kazakhstan for the UEFA Nations League home matche with Belarus on 22 September and away to Azerbaijan on 25 September.
The remainer of the squad will return to training on Wednesday 21 September.