Sebastian Vettel enters the Mexican Grand Prix with caution over Ferrari's chances, despite both Red Bull and Mercedes expecting them to be favourites once again. Successful upgrades have helped Ferrari take pole position in all five races since the summer break, although victories have not followed in the last two races in Russia and Japan. Article continues under video With a pit straight that runs for over a kilometre (only Baku's is longer on the F1 calendar) Ferrari's speed advantage is expected to come to the fore once again. However, the altitude of Mexico City often levels out the performance of power units, and Red Bull's high-downforce capabilities has proved the winning ticket...
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