Red Bull team principal Christian Horner believes this year's driver market will be dictated by Sebastian Vettel's next move.
Several top drivers are out of contract at the end of this season, including Vettel, his Ferrari teammate Kimi Raikkonen, McLaren's Fernando Alonso and Mercedes' Valtteri Bottas.
Ferrari has left the door open for Vettel to remain at Maranello, but with Toto Wolff yet to confirm Bottas for 2018 there are still rumours he could make a switch to Mercedes.
Horner believes the rest of the available drivers will fit around Vettel's plans, but made clear that Red Bull's line-up of Max Verstappen and Daniel Ricciardo would remain unchanged.