The session was mostly red-flagged as the GPS system for the teams stopped functioning, meaning the pit walls were unable to track where their drivers were – with several laps having to be aborted as drivers complained of traffic jams around Albert Park.
F1 2023 results: Free Practice 1, Australian Grand Prix, Friday 31st March
1 Max Verstappen Red Bull 1:18.790 17 laps
2 Lewis Hamilton Mercedes + 0.433 20 laps
3 Sergio Perez Red Bull + 0.503 19 laps
4 Fernando Alonso Aston Martin + 0.527 23 laps
5 Charles Leclerc Ferrari + 0.588 16 laps
6 Carlos Sainz Ferrari + 0.715 20 laps
7 Lando Norris McLaren + 0.746 16 laps
8 Pierre Gasly Alpine + 0.856 22 laps
9 George Russell Mercedes + 0.909 23 laps
10 Lance Stroll Aston Martin + 0.976 19 laps
11 Alex Albon Williams + 0.976 21 laps
12 Oscar Piastri McLaren + 0.987 22 laps
13 Nico Hulkenberg Haas + 1.016 19 laps
14 Nyck de Vries AlphaTauri + 1.143 25 laps
15 Logan Sargeant Williams + 1.284 21 laps
16 Esteban Ocon Alpine + 1.385 20 laps
17 Yuki Tsunoda AlphaTauri + 1.609 14 laps
18 Valtteri Bottas Alfa Romeo Racing + 1.629 21 laps
19 Zhou Guanyu Alfa Romeo Racing + 1.779 22 laps
20 Kevin Magnussen Haas + 2.357 17 laps