20 Karun Chandhok

The 26-year-old is a hard worker and proved himself to be a capable, if inconsistent, performer in three years of GP2 Series.

Two wins were the highlight in F1's feeder formula, although he is up against it going into a debut F1 season with fewer than 500km of test miles under his belt - all of those for Red Bull in 2008.

He hasn't got the machinery to set the world alight, and a season of quiet progress on a steep learning curve is the order of the day.