Nico Rosberg led a Mercedes 1-2 during the final practice session for the Mexican Grand Prix.
Rosberg clocked a time of 1:21.083 to finish the session 0.067s clear of Lewis Hamilton, who sat out the first half of the session.
Red Bull built on its Friday practice pace with Daniel Ricciardo a tenth adrift of Rosberg in third place, while Daniil Kvyat was fifth.
Sebastian Vettel split the Red Bull drivers but team-mate Kimi Räikkönen endured a troublesome session.
Räikkönen finished down in 17th place after his SF15-T developed a problem early in the session, forcing him to stop the car by the side of the circuit.
Sergio Pérez was an encouraging sixth in front of his home fans, ahead of Williams’ Valtteri Bottas and Toro Rosso’s Carlos Sainz Jr.
Felipe Massa placed ninth, leaving Nico Hülkenberg to complete the top 10.
Max Verstappen was 11th, in front of Lotus drivers Pastor Maldonado and Romain Grosjean.
Marcus Ericsson beat Fernando Alonso to 14th place, ahead of Felipe Nasr, Räikkönen and the Manor Marussia drivers.
Jenson Button’s McLaren suffered a mechanical fault and he completed only four laps.