Each Formula 1 team needs to satisfy the rule of running a ‘rookie’ driver twice in each of its cars during a season.
Rookies are defined as any driver with no more than one grand prix start to their name. So Kimi Antonelli (Mercedes) Isack Hadjar (Racing Bulls) and Gabriel Bortoleto (Sauber) all ticked off the rookie requirements for their cars in Australia and China.
As Ollie Bearman (Haas) already started three grands prix last year, he doesn't count, while Alpine rookie Jack Doohan only counted for Australia because he made his F1 debut in Abu Dhabi last year.
This Friday in Austria, Ferrari junior Dino Beganovic will make his second FP1 appearance, having made his FP1 bow in Bahrain. Meanwhile McLaren will hand an FP1 debut to its F2 points leader Alex Dunne.
McLaren (2)
Alex Dunne - Austria
Pato O'Ward - Mexico
Ferrari (2)
Dino Beganovic - Bahrain, Austria
Red Bull (1)
Ayumu Iwasa - Bahrain
Mercedes (3)
Kimi Antonelli - Australia, China
Frederick Vesti - Bahrain
Aston Martin (1)
Felipe Drugovich - Bahrain
Alpine (2)
Jack Doohan - Australia
Ryo Hirakawa - Japan
Haas (2)
Ryo Hirakawa - Bahrain, Barcelona
Racing Bulls (2)
Isack Hadjar - Australia, China
Williams (2)
Luke Browning - Bahrain
Victor Martins - Barcelona
Sauber (2)
Gabriel Bortoleto - Australia, China