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F1: Nico Rosberg dominates last day of Bahrain test for Mercedes (+photos)

German Nico Rosberg recorded a blistering time of 1min33.283s aboard his Mercedes W05 to keep the Brackley outfit on top on the final day of this Bahrain winter test.

The 28-year-old, who was 1.5s quicker than McLaren's Jenson Button, the second-fastest driver of the day, completed a total of 89 laps of the Bahrain International Circuit.

F1, Bahrain International Circuit Nico Rosberg, Mercedes W05
Nico Rosberg, Mercedes W05 (Photo: WRi2)

"This morning we were able to try some qualifying practice runs which felt good," said Rosberg. "Later in the day, we did a race simulation. (…) My head was full of information!"

His best time Saturday was the quickest of the four-day pre-season venue, and less than a second shy of his best V8-powered time of last year at the same circuit.

F1, Bahrain International Circuit, Kimi Raikkonen, Ferrari F14T
Kimi Raikkonen, Ferrari F14T (Photo: WRi2)

Ferrari's Kimi Raikkonen crashed late in the day but still managed to be third fastest aboard the F14T.

"I spun on the kerb at the exit of turn 4, these things can happen. Luckily, it was right at the end of the day."

F1, Bahrain International Circuit, Felipe Nasr, Williams FW36
Felipe Nasr, Williams FW36 (Photo: WRi2)

Driving a Formula One car for the first time, Brazilian Felipe Nasr was an impressive fourth. It was announced earlier today the 21-year-old will be Williams' test and reserve driver this season. He completed 87 laps behind the wheel of the FW36.

Pastor Maldonado was fifth fastest for Lotus, while Red Bull endured another difficult day. Daniel Ricciardo only managed 15 laps throughout the day. The Australian settled for seventh fastest.

"In all honesty it wasn't a great day today," said Ricciardo. "I guess we still need more time. We have four more days coming up and hopefully we can maximise those.

F1, Bahrain International Circuit, Pastor Maldonado, Lotus E22
Pastor Maldonado, Lotus E22 (Photo: WRi2)

Best lap time in 2013:
Nico Rosberg, Mercedes AMG in Q3: 1m32.330

Best lap time, Day 1:
Nico Hulkenberg, Force India, 1m36.880

Best lap time, Day 2:
Kevin Magnussen McLaren, 1m34.910

Best lap time Day 3:
Lewis Hamilton, Mercedes, 1m34.263

Unofficial Saturday test times from Bahrain

1. Nico Rosberg, Mercedes, 1m 33.283s, 89 laps

2. Jenson Button, McLaren, 1m 34.957s, 66 laps

3. Kimi Raikkonen, Ferrari, 1m 36.718s, 82 laps

4. Felipe Nasr, Williams, 1m 37.569s, 87 laps

5. Pastor Maldonado, Lotus, 1m 38.707s, 59 laps

6. Sergio Perez, Force India, 1m 39.258s, 19 laps

7. Daniel Ricciardo, Red Bull, 1m 39.837s, 15 laps

8. Jean-Eric Vergne, Toro Rosso, 1m 40.472s, 19 laps

9. Kamui Kobayashi, Caterham, 1m 43.027s, 17 laps

10. Marcus Ericsson, Caterham, 1m 45.094s, 4 laps
11. Adrian Sutil, Sauber, no time, 7 laps

12. Jules Bianchi, Marussia, no time, 5 laps