Mercedes driver Lewis Hamilton has topped the standings in the second practice session ahead of the Russian Grand Prix.

Hamilton, who leads teammate Nico Rosberg by 10 points in the drivers' standings, finished almost a second quicker than McLaren's Kevin Magnussen and Ferrari's Fernando Alonso.

Rosberg, who was the quickest round the track this morning, was in fourth place, with Williams driver Valtteri Bottas close behind in fifth and Jenson Button ending the session in sixth position.

Red Bull endured a disappointing afternoon in Sochi as Sebastian Vettel finished in ninth, while Daniel Ricciardo was back in 13th place.

Full Standings:

1. Lewis Hamilton (Mercedes)
2. Kevin Magnussen (McLaren)
3. Fernando Alonso (Ferrari)
4. Nico Rosberg (Mercedes)
5. Valtteri Bottas (Williams)
6. Jenson Button (McLaren)
7. Felipe Massa (Williams)
8. Daniil Kvyat (Toro Rosso)
9. Sebastian Vettel (Red Bull)
10. Jean-Eric Vergne (Toro Rosso)
11. Kimi Raikkonen (Ferrari)
12. Nico Hulkenberg (Force India)
13. Daniel Ricciardo (Red Bull)
14. Sergio Perez (Force India)
15. Adrian Sutil (Sauber)
16. Romain Grosjean (Lotus Renault)
17. Pastor Maldonado (Lotus Renault)
18. Esteban Gutierrez (Sauber)
19. Marcus Ericsson (Caterham)
20. Max Chilton (Marussia)
21. Kamui Kobayashi (Caterham)