Nine rookies took part in Formula 1's first practice session at the Mexican Grand Prix, with every team bar Sauber fielding a rookie.

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 at the start of the 2025 F1 season.

As Ollie Bearman (Haas) already started three grands prix last year, he didn't count, while Alpine rookie Jack Doohan could have counted for Australia because he made his F1 debut in Abu Dhabi last year, but Alpine already planned to use rookies for four sessions.

In Mexico, nine of the teams fielded rookie drivers with only Sauber, which has already completed its requirements, fielding a complete regular driver line-up.

Current Formula 2 drivers Luke Browning, Jak Crawford and Arvid Lindblad drove for Williams, Aston Martin and Red Bull respectively - with Crawford making his F1 FP1 debut, and due back for more in Abu Dhabi now too.

Browning and Lindblad were making their second appearances of the year, with Browning now confirmed for FP1 at the season-ending Abu Dhabi GP and the young driver test after that race weekend.

2025 FP1 rookie runs confirmed so far

McLaren (3)
Alex Dunne - Austria, Italy
Pato O'Ward - Mexico

Ferrari (3)
Dino Beganovic - Bahrain, Austria
Antonio Fuoco - Mexico

Red Bull (3)
Ayumu Iwasa - Bahrain
Arvid Lindblad - Britain, Mexico

Mercedes (4)
Kimi Antonelli - Australia, China
Frederick Vesti - Bahrain, Mexico

Aston Martin (4)
Felipe Drugovich - Bahrain, Hungary
Jak Crawford - Mexico, Abu Dhabi

Alpine (4)
Jack Doohan - Australia (not counted)
Paul Aron - x3 (Italy, Mexico + 1 TBC track)
Ryo Hirakawa - Japan

Haas (4)
Ryo Hirakawa - Bahrain, Spain, Mexico, Abu Dhabi

Racing Bulls (4)
Isack Hadjar - Australia, China
Ayumu Iwasa - Mexico, Abu Dhabi

Williams (4)
Luke Browning - Bahrain, Mexico, Abu Dhabi
Victor Martins - Spain

Sauber (4)
Gabriel Bortoleto - Australia, China
Paul Aron - Britain and Hungary