Two Caterhams and a Marussia seat are all that remain available for next year after Esteban Gutierrez secured his future.
The Mexican is the latest driver to book his place on next year's grid after signing a new deal with Force India, joining the also recently-announced Nico Hulkenberg.
That leaves just two Sauber seats still open, one at Marussia and both Caterhams.
The 2014 F1 Grid
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