Ferrari turned the tables on Mercedes during the second practice session for the Chinese Grand Prix as Kimi Räikkönen led a 1-2 for the team on Super Soft tyres.
Räikkönen posted a lap of 1:36.896 to finish 0.109s clear of team-mate Sebastian Vettel, who went slightly deep into the Turn 14 hairpin on his flying lap.
Mercedes drivers Nico Rosberg and Lewis Hamilton completed their Super Soft runs slightly earlier in the session and placed third and fourth, with the German 0.237s behind compatriot Vettel.
Hamilton was almost two-tenths further behind his team-mate, as he prepares to drop five places on the grid due to a gearbox penalty.
Red Bull’s Daniel Ricciardo was fifth quickest, albeit with an eight-tenths deficit to Hamilton.
Max Verstappen placed sixth for Toro Rosso, while a few hundredths covered Force India drivers Nico Hülkenberg and Sergio Pérez, split by Carlos Sainz Jr.
Valtteri Bottas completed the top 10 for Williams, fractions clear of McLaren’s Fernando Alonso, who was cleared for a full-time return after the first session.
An FIA statement added that if Alonso experiences any “abnormal symptoms,” he “must stop his car immediately.”
Jenson Button was 12th, ahead of Daniil Kvyat and Felipe Massa, while Renault rookie Jolyon Palmer placed 15th.
Romain Grosjean was 16th for Haas, as Pascal Wehrlein finished 17th, in front of Sauber pair Marcus Ericsson and Felipe Nasr, themselves split by Rio Haryanto.
Esteban Gutiérrez, who suffered an electrical issue in the first session, completed only a couple of laps early on before the rear brakes on his Haas VF-16 caught fire.
Gutiérrez was able to return to the pits in order for Haas to repair the problem but the Mexican did not reappear on track.
Kevin Magnussen did not run in the second session as Renault investigated the issue which led to a tyre failure in the first session.