Caterham went into administration on Friday while Marussia are also struggling financially.
Nico Hulkenberg returned to Force India at the start of 2014 after spending a year with Sauber.
Mercedes take first constructors’ title as Lewis Hamilton extends his lead with the win in Russia.
Hamilton took the flag 13.6 seconds ahead of Rosberg. Bottas was third in a Williams, 17.4 seconds back.
Hamilton earned his 7th pole this season by beating teammate Rosberg by two-tenths of a second in qualifying.
Hamilton was second in first practice behind teammate Rosberg but dominated afternoon run by a wide margin.
Inaugural Russian Grand Prix will be held in the backdrop of Jules Bianchi crash, political issues.
A delay until 2015 on car-performance messaging will give teams more time to prepare their telemetry.
Teams were told that any talk over the radio about the performance of the car would be considered contravention.
Hamilton wins Monza after pressuring teammate Rosberg into committing critical error.
Rosberg now has 238 points to Hamilton’s 216, with 6 races left after the end of the European part of the season.
Rosberg was blamed by the team following the race for causing what was an avoidable collision with Hamilton.
Mercedes’ Hamilton and Rosberg offer opposing views on ‘team orders controversy’.
Lewis Hamilton is eleven points behind Nico Rosberg in the title race.
Sahara Force India recorded its worst performance of the season.