All but Red Bull and Toro Rosso have confirmed their line-ups for thetywo-day post-GP test which gets underway at Barcelona on Tuesday.

Mercedes will have Nico Rosberg on Tuesday while Esteban Ocon will make his much anticipated debut with the German team the day after.

Ferrari will have Antonio Fuoco in the SF16-H on Tuesday before handing over to Sebastian Vettel on Wednesday.

Alex Lynn gets proceedings underway at Williams before stepping aside for Felipe Massa.

Perhaps they are waiting to see what happens on the opening lap today and whether it will result in any further driver movements, either way, neither Red Bull or Toro Rosso has confirmed its line-up.

For reasons known only to itself, Force India has Alfonso Celis Jr on duty on both days.

Before making his debut with Mercedes, Esteban Ocon will drive the Renault RS16 as part of his test and reserve driver role, before handing over to Kevin Magnussen.

McLaren will have Jenson Button and Stoffel Vandoorne in action, whilst Manor will rely on Pascal Wehrlein and Jordan King.

Finally, Haas will rely on its two regular racers, Romain Grosjean driving on Tuesday and Esteban Gutierrez on Wednesday.

Sauber, which has no test driver, no updates and seemingly no money, has opted to miss the test.

Check out our Sunday gallery, here.