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Charles Leclerc ended the opening practice session fastest for the Formula 1 Miami Grand Prix.
| Pos | Num | Driver | Team | Laps | Time | Diff |
| 1 | 16 | Charles Leclerc | Scuderia Ferrari | 25 | 1:31.098 | |
| 2 | 63 | George Russell | Mercedes-AMG F1 Team | 22 | 1:31.169 | +0.071s |
| 3 | 1 | Max Verstappen | Red Bull Racing | 14 | 1:31.277 | +0.179s |
| 4 | 11 | Sergio Perez | Red Bull Racing | 21 | 1:31.301 | +0.203s |
| 5 | 10 | Pierre Gasly | Scuderia AlphaTauri | 26 | 1:31.498 | +0.400s |
| 6 | 55 | Carlos Sainz | Scuderia Ferrari | 24 | 1:31.528 | +0.430s |
| 7 | 23 | Alex Albon | Williams Racing | 19 | 1:31.854 | +0.756s |
| 8 | 44 | Lewis Hamilton | Mercedes-AMG F1 Team | 22 | 1:31.956 | +0.858s |
| 9 | 20 | Kevin Magnussen | Haas F1 Team | 19 | 1:32.559 | +1.461s |
| 10 | 3 | Daniel Ricciardo | McLaren F1 Team | 20 | 1:32.592 | +1.494s |
| 11 | 4 | Lando Norris | McLaren F1 Team | 25 | 1:32.615 | +1.517s |
| 12 | 14 | Fernando Alonso | Alpine F1 Team | 30 | 1:32.884 | +1.786s |
| 13 | 24 | Zhou Guanyu | Alfa Romeo F1 Team | 22 | 1:33.020 | +1.922s |
| 14 | 5 | Sebastian Vettel | Aston Martin F1 Team | 23 | 1:33.024 | +1.926s |
| 15 | 31 | Esteban Ocon | Alpine F1 Team | 26 | 1:33.417 | +2.319s |
| 16 | 18 | Lance Stroll | Aston Martin F1 Team | 22 | 1:33.576 | +2.478s |
| 17 | 77 | Valtteri Bottas | Alfa Romeo F1 Team | 13 | 1:33.773 | +2.675s |
| 18 | 22 | Yuki Tsunoda | Scuderia AlphaTauri | 26 | 1:34.043 | +2.945s |
| 19 | 47 | Mick Schumacher | Haas F1 Team | 19 | 1:34.945 | +3.847s |
| 20 | 6 | Nicholas Latifi | Williams Racing | 26 | 1:35.637 | +4.539s |
