Red Bull driver Sebastian Vettel has done the double in India by setting the pace in both practice sessions ahead of Sunday's Indian Grand Prix.
The German, who has been tipped to secure the Championship title this weekend, managed to keep up his speed in the second practice, while teammate Mark Webber came in just behind.
The start of the session was troublesome for Lotus driver Kimi Raikkonen, who misjudged the apex on the brow of a hill on the track, which caused him to spin and flatspot his left front tyre.
The Finn, who will return to Ferrari for the 2014 campaign, has been struggling for speed this weekend, but it was a different story for teammate Romain Grosjean, who secured the third-fastest time of the session.
Mercedes driver Lewis Hamilton clocked the fourth-fastest time in India.
Second practice full standings:
1. Sebastian Vettel (Red Bull)
2. Mark Webber (Red Bull
3. Romain Grosjean (Lotus)
4. Lewis Hamilton (Mercedes)
5. Fernando Alonso (Ferrari)
6. Nico Rosberg (Mercedes)
7. Felipe Massa (Ferrari)
8. Kimi Raikkonen (Lotus)
9. Sergio Perez (McLaren)
10. Jenson Button (McLaren)
11. Daniel Ricciardo (Toro Rosso)
12. Adrian Sutil (Force India)
13. Valtteri Botas (Williams)
14. Nico Hulkenberg (Sauber)
15. Paul di Resta (Force India)
16. Pastor Maldonado (Williams)
17. Esteban Gutierrez (Sauber)
18. Jean-Eric Vergne (Toro Rosso)
19. Giedo van der Garde (Caterham)
20. Jules Bianchi (Marussia)
21. Charles Pic (Caterham)
22. Max Chilton (Marussia)
Danielle Joynson
