Lando Norris topped the final practice session ahead of the Mexico City Grand Prix, the McLaren driver more than three-tenths clear of Ferrari's Lewis Hamilton as Mercedes' George Russell completed the top three.
Norris posted his 1m 16.633s with less than 10 minutes remaining in Free Practice 3 at the Autódromo Hermanos Rodríguez circuit, with title rivals Oscar Piastri and Max Verstappen only fifth and sixth respectively.
Verstappen, who was unhappy with his race pace on Friday, was the first driver to set a time in Saturday's one-hour session, but it took until well after the opening 10 minutes for the majority of the field to head out on track.
Hamilton was immediately pushing the limits, the Ferrari driver running slightly deep at Turn 4 on his first flying lap, before then taking to the grass at Turn 1 at the start of his next attempt.
Approaching the 15-minute mark, Carlos Sainz jumped to the top of the times having been the first driver to use a set of soft Pirelli tyres, his 1m 18.028s remaining as the benchmark approaching the halfway point.
Hamilton once again ran deep at Turn 4, as did Norris on his first flying lap, the McLaren driver slotting into third behind Sainz and Verstappen with his next attempt as the 20 drivers struggled to avoid traffic around the relatively short 2.67-mile circuit.