Max Verstappen topped the time sheets in Bahrain when the first day of pre-season testing concluded, an ominous sign for the rest of the grid ahead of the upcoming season.
The defending world champion completed a total of 142 laps in Sakhir, setting a quickest time of 1:31.344.
Both sessions were fairly free of incidents, though in the morning Alex Albon pulled to the side of the track in sector one to bring out the first yellow flag of the season with a reliability issue with just over twenty minutes to go.
There were further Williams issues in the afternoon as Logan Sargeant took a dramatic spin at Turn 9 and narrowly avoided a collision with a trackside barrier.
The next F1 testing session gets underway on Thursday morning and is set to begin at 2am ET.
F1 Testing Results: Day One
Below is the full classification from the first day of testing in Bahrain:
1. Max Verstappen (Red Bull): 1:31.344, 142 Laps
2. Lando Norris (McLaren): +1.140s, 72 Laps
3. Carlos Sainz (Ferrari): +1.240s, 69 Laps
4. Daniel Ricciardo (Visa Cash App RB): +1.255s, 51 Laps
5. Pierre Gasly (Alpine): +1.461s, 60 Laps
6. Lance Stroll (Aston Martin): +1.663s, 53 Laps
7. Charles Leclerc (Ferrari): +1.903s, 64 Laps
8. Fernando Alonso (Aston Martin): +2.041s, 77 Laps
9. Oscar Piastri (McLaren): +2.527s, 57 Laps
10. Zhou Guanyu (Stake F1 Team): +2.314s, 62 Laps
11. Logan Sargeant (Williams): +2.538s, 21 Laps
12. George Russell (Mercedes): +2.765s, 121 Laps
13. Yuki Tsunoda (Visa Cash App RB): +2.792s, 64 Laps
14. Valtteri Bottas (Stake F1 Team): +3.087s, 68 Laps
15. Alex Albon (Williams): +3.243s, 40 Laps
16. Esteban Ocon (Alpine): +3.333s, 60 Laps
17. Kevin Magnussen (Haas): +4.348s, 66 Laps
18. Nico Hulkenberg (Haas): +4.562s, 82 Laps