Kimi Raikkonen set fastest, Ferrari one-two in the Friday second practice session for the Chinese Grand Prix in Shanghai.
Raikkonen set a best time of 1:36.896 on the super-soft tyre with race simulation set-up, team-mate Sebastian Vettel 0.109 seconds behind.
The Mercedes duo of standings leader Nico Rosberg was third, 0.237 adrift and world champion Lewis Hamilton was fourth at 0.433.
Daniel Ricciardo strengthened made third fastest behind Mercedes and Ferrari by finishing fifth in FP2 ahead of Toro Rosso young speedy Max Verstappen.
Nico Hulkenberg and Sergio Perez put in an impressive display for Force India, charging to seventh and ninth place respectively. Carlos Sainz Jr. split the pair in the second Toro Rosso. Valtteri Bottas rounded out the top 10 for Williams.
Both Williams and McLaren were few tenths further back, Fernando Alonso, who passed a medical to race after missing Bahrain, was 11th.
Another difficult session for new entrant Haas F1 team as Esteban Gutierrez was sidelined by a brake fire early on. The Mexican driver was forced to stop FP1 due to an electrical issue.