Overnight rain in Mexico meant the track was quite damp at the start of the final practice session.
Alex Albon pumped in the opening time of the session on a 1:31.539 on the intermediate tyres. The Thai eventually lowered his benchmark to a 1:27.463.
Verstappen leapt to the top of the charts at the 15-minute mark as the Dutchman posted a 1:26.118, 0.4s ahead of Hamilton and 0.6s in front of Albon and Bottas. Leclerc in 5th was the only other driver to have set a time by that point.
Neither Renault driver could do any competitive laps in FP3 due to a pollution of one of the cooling systems on both cars.
UPDATE 🛠— Renault F1 Team (@RenaultF1Team) October 26, 2019
We appear to have the same issue on both cars - a pollution of one of the cooling systems, which requires careful cleaning before qualifying. Our guys are working hard to fix it but we’re unlikely to go out in this session.#RSspirit #MexicoGP #FP3
Kimi Raikkonen was the first driver to switch to dry tyres with 15 minutes to go and did a 1:21.673 on the softs to go fastest by 4.4s from Verstappen.
Sebastian Vettel banged in a 1:17.744 to post the first proper flier on the slicks. The German using the soft tyre to go P1.
The track continued to evolve as the session drew to a close and the times tumbled.
Charles Leclerc ended up fastest in final practice with a 1:16.145, 0.027s ahead of Ferrari team-mate Sebastian Vettel. Bottas and Hamilton were P3 and P4, 0.1 and 0.2s off respectively.
Sainz, Verstappen, Gasly, Albon, Norris and Perez rounded out the top 10.
Kvyat, Raikkonen, Stroll, Giovinazzi, Magnussen, Grosjean, Russell and Kubica filled positions 11-18 as the Renaults failed to set a time.