Remaining seats are already thin on the ground. Hulkenberg has been mentioned as an outside option for Red Bull, but team boss Christian Horner is keen to continue with their philosophy of promoting from within the system.
It leaves a spot at Williams, Hulkenberg's first F1 team who now prop up the championship, and Alfa Romeo, with Auto Bild claiming that Antonio Giovinazzi's seat could well open up for the German amid the Italian struggling to match the performances and results of experienced colleague Kimi Raikkonen.
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