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Rosberg: set fastest time
Mercedes GP's Nico Rosberg eclipsed teammate Michael Schumacher as he set the fastest lap in second practice for the Bahrain Grand Prix.
The German clocked a 1:55.409 on Friday afternoon to beat Lewis Hamilton by 0.445s.
Jaime Alguesuari set the first time of the day at 2:02.757. However, he was quickly overhauled by both Ferrari drivers, Tonio Liuzzi and Jenson Button, who went quickest with a 1:56.944.
Button's reign was short-lived as Nico Hulkenberg went quickest only to lose out to Hamilton moments later. The Brit clocked a 1:56.051, the quickest time seen at Bahrain on Friday, while Rubens Barrichello took fourth place with the two Force inida's behind him.
Schumacher put in a flier as the Mercedes GP driver took second place only to be dropped as his team-mate Rosberg went quickest with a 1:55.555, almost half a second up on Hamilton's best.
Sebastian Vettel, tipped to become the 2010 world champ by Bernie Ecclestone, improved to sixth place, slotting in between the two Williams drivers while Vitaly Petrov put his Renault up into tenth.
Bruno Senna ventured out in his HRT but the Brazilian was slowest of all, a full 14 seconds off the pace. His team-mate Karun Chandhok has yet to set a time due to a reported hydraulic problem. Sebastien Buemi and Timo Glock also failed to set times by the halfway mark.
1. Rosberg Mercedes 1:55.409 23 laps
2. Hamilton McLaren-Mercedes 1:55.854 + 0.445 22 laps
3. Schumacher Mercedes 1:55.903 + 0.494 23 laps
4. Button McLaren-Mercedes 1:56.076 + 0.667 28 laps
5. Vettel Red Bull-Renault 1:56.459 + 1.050 18 laps
6. Hulkenberg Williams-Cosworth 1:56.501 + 1.092 26 laps
7. Massa Ferrari 1:56.555 + 1.146 30 laps
8. Petrov Renault 1:56.750 + 1.341 26 laps
9. Alonso Ferrari 1:57.140 + 1.731 25 laps
10. de la Rosa Sauber-Ferrari 1:57.255 + 1.846 24 laps
11. Kobayashi Sauber-Ferrari 1:57.352 + 1.943 27 laps
12. Sutil Force India-Mercedes 1:57.361 + 1.952 29 laps
13. Barrichello Williams-Cosworth 1:57.452 + 2.043 21 laps
14. Liuzzi Force India-Mercedes 1:57.833 + 2.424 29 laps
15. Kubica Renault 1:58.155 + 2.746 29 laps
16. Alguersuari Toro Rosso-Ferrari 1:59.799 + 4.390 31 laps
17. Webber Red Bull-Renault 2:00.444 + 5.035 12 laps
18. Kovalainen Lotus-Cosworth 2:00.873 + 5.464 23 laps
19. Trulli Lotus-Cosworth 2:00.990 + 5.581 14 laps
20. Glock Virgin-Cosworth 2:02.037 + 6.628 3 laps
21. di Grassi Virgin-Cosworth 2:02.188 + 6.779 21 laps
22. Senna HRT-Cosworth 2:06.968 + 11.559 17 laps
23. Buemi Toro Rosso-Ferrari 1 laps
24. Chandhok HRT-Cosworth
Paul di Resta was many people's rookie of the year in 2011 as he helped Force India to sixth in the constructor's standings.
Review our running live commentary from the first day of winter testing at Jerez...
Red Bull, McLaren and Ferrari take to the circuit at Jerez as they prepare for the 2012 season.