While Hamilton was fastest of all, team-mate Valtteri Bottas could only reach fifth on the leaderboard – a result that would deliver a sixth world championship to Hamilton if replicated on raceday.
Charles Leclerc was second, just a tenth adrift of Hamilton o harder tyres, while Max Verstappen was similarly in close quarters, although Sebastian Vettel was almost a second adrift, having made a mistake on his fastest lap.
? RED FLAG ?
Problems for @lance_stroll – he’s into the barriers at the final turn ?
— Formula 1 (@F1) October 25, 2019
The Canadian was able to get going again in the session but it remains to be seen if there will be an impact over the remainder of the weekend in the form of grid penalties.
Mexican GP FP1 results
1. Lewis Hamilton (Mercedes) 1:17.327
2. Charles Leclerc (Ferrari) 1:17.446
3. Max Verstappen (Red Bull) 1:17.461
4. Alexander Albon (Red Bull) 1:17.949
5. Valtteri Bottas (Mercedes) 1:18.005
6. Sebastian Vettel (Ferrari) 1:18.218
7. Carlos Sainz (McLaren) 1:18.401
8. Pierre Gasly (Toro Rosso) 1:18.593
9. Daniil Kvyat (Toro Rosso) 1:18.835
10. Antonio Giovinazzi (Alfa Romeo) 1:18.959
11. Nico Hulkenberg (Renault) 1:19.011
12. Kevin Magnussen (Haas) 1:19.013
13. Kimi Raikkonen (Alfa Romeo) 1:19.205
14. Lando Norris (McLaren) 1:19.299
15. Daniel Ricciardo (Renault) 1:19.499
16. Lance Stroll (Racing Point) 1:19.679
17. Sergio Perez (Racing Point) 1:19.717
18. Romain Grosjean (Haas) 1:19.850
19. George Russell (Williams) 1:20.548
20. Nicholas Latifi (Williams) 1:21.566