Max Verstappen edged out Kimi Antonelli to go quickest in the final practice session of the São Paulo Grand Prix.
The Dutchman crossed the line 0.025 seconds quicker than new world champion Antonelli, but will be starting from the back of the grid for Sunday's race.
Verstappen had an all-new engine fitted to his Red Bull before the session.
Lando Norris, who has been looking quick in his heavily-upgraded McLaren, was over one-tenth off the pace.
Mercedes' George Russell was fourth-fastest and Ferrari's Charles Leclerc was behind in fifth.
Leclerc and teammate Lewis Hamilton will be taking a 10-place grid penalty for the race for taking new internal combustion engines.
Hamilton suffered issues inside the last 25 minutes of the session and returned to the garage. He finished in 12th.
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Russell is taking a five-place grid drop after his team fitted another new engine to his Mercedes.
McLaren's Oscar Piastri finished sixth-fastest, with Racing Bulls' Arvid Lindblad seventh and Liam Lawson eighth, respectively.
The weather started to turn towards the end of the session and rain could be on the way ahead of qualifying at 6 p.m. GMT / 1 p.m. ET.