There will be 22 drivers on the grid at the start of the 2016 Formula One season, and the identities of 20 of them are already known. Only Manor, the smallest team in the sport, are yet to announce who will be racing for them in 2016.
The team finished last in the 2015 championship, and they are unlikely to finish much higher this time around. However, Manor will be using the all-conquering Mercedes engines for the season ahead—so a drive for the British team could give a young hopeful a genuine opportunity to impress.
Demand for the two seats is therefore high.
Manor ran three drivers in 2015, and two of them are in the running to return in 2016. Will Stevens was the team's only full-time driver, contesting 17 of the 19 grands prix, while Alexander Rossi drove in five races toward the end of the year. Both will need some degree of sponsor-backing to secure a seat, and both have at least some cash to offer.
Another name in the frame is that of Rio Haryanto. The Indonesian finished fourth in the 2015 GP2 championship; though his career record is not exceptional, he packs a formidable punch in terms of sponsorship.
Pascal Wehrlein, by contrast, has the stats to suggest he's ready to make the step up to F1—but his financial package, courtesy of Mercedes, is relatively small.
So who will Manor choose?
Here, we take a look at each of the four main contenders and assess what chance each has of driving for Manor in 2016. We also look at a few less likely candidates—like Kevin Magnussen or Sergey Sirotkin—who could yet spring a surprise.