Charles Leclerc carried his impressive opening-session form into the afternoon at the Mexico City Grand Prix, topping FP2 to complete a Ferrari double at the head of Friday’s timesheets.
But while the Monegasque enjoyed another trouble-free outing, team-mate Lewis Hamilton suffered a premature end to his session with a suspected technical problem.
Having clocked a 1m18.128s in FP1, Leclerc went even quicker in the second hour, posting a 1m17.827s to edge reigning world champion Lando Norris by 0.103s. Mercedes duo George Russell and Kimi Antonelli followed, while Max Verstappen could manage only fifth.
Hamilton strikes first, but Leclerc takes control
With all 20 regular drivers back in action after 10 rookies occupied seats in FP1, the track quickly filled as teams made the most of their second hour of running.
Hamilton initially set the pace on medium tyres with a 1m18.741s, but Leclerc soon eclipsed that benchmark by almost half a second, stopping the clock at 1m18.257s.
Track evolution continued to play a significant role at the notoriously low-grip Autodromo Hermanos Rodriguez, although Verstappen briefly attracted more attention for the wrong reasons.
The Red Bull driver went wheel-to-wheel with Racing Bulls’ Liam Lawson through the stadium section, with their encounter producing a shower of debris and prompting race control to deploy the red flag after just 15 minutes.
Running resumed five minutes later, with Antonelli splitting the Ferrari pair on mediums. Leclerc, meanwhile, looked poised to reclaim a commanding advantage on soft tyres, only to run wide through the stadium and abandon his flying lap.
That opened the door for Norris, who moved to the top with a 1m18.161s after 25 minutes. Leclerc subsequently locked up into Turn 1 and aborted another attempt, leaving the McLaren driver temporarily in control.
Hamilton's Ferrari falls silent
The session then took an unwelcome turn for Ferrari. Hamilton began losing power along the main straight before bringing his car to a halt at the exit of Turn 3, triggering a brief Virtual Safety Car period after just 28 minutes.
The seven-time world champion's afternoon was over, but Leclerc continued to find time. He lowered the benchmark to 1m17.966s before delivering an even stronger lap of 1m17.827s to secure top spot.
With 20 minutes remaining, attention shifted to high-fuel running, bringing an end to the competitive soft-tyre assaults. Haas driver Esteban Ocon was clearly unimpressed with the prospect of switching to mediums, telling race engineer Laura Mueller: "don't do that to me" before ultimately making the change.
Norris eventually settled for second, just ahead of Russell, whose 1m17.933s left him 0.003s behind the McLaren. Antonelli was fourth, followed by Verstappen and Red Bull team-mate Isack Hadjar.
Arvid Lindblad put Racing Bulls seventh, ahead of Pierre Gasly, Lawson and Oscar Piastri, who completed the top ten.
For Ferrari, the contrasting fortunes were unmistakable: Leclerc ended Friday on top, while Hamilton was left with plenty of questions to answer.
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