Swiss team Sauber's new Russian partners will result in Sirotkin being groomed for a 2014.
Gutiierrez stays in Sauber, while Sirotkin will be a test driver; Koboyashi spotted at Caterham.
Lotus boss Eric Boullier commented: "So we're actually a little disappointed by this change"
While Timo Glock prepares for a DTM test, the focus shifts to which F1 driver will take the German's seat at Marussia. Apparently not Vitaly Petrov.
Alguersuari indicated he will keep working with Pirelli.
Drivers with powerful backers overshadowed Jaime this season, and now he is losing hope for the future in F1 at all
Pirelli test driver Jaime Alguersuari appears to plan a move to IndyCar with Panther Racing in the American open-wheel series.
Michael Schumacher will run the WSK Euro Series race at Italy's La Conca circuit.
Tost acknowledged that Vergne will have to take on a leadership role in 2014.