Mercedes claimed their first win of 2013 with victory at the Monaco Grand Prix as Nico Rosberg completed a dominant weekend.
Rosberg led from start to finish in a race hit by three safety cars and a red flag as Monte Carlo's streets again played their part in an eventful race.
At the start everyone got away well with no major incidents at the front, further down Geido van der Garde, starting in 15th for Caterham, was caught up with team-mate Charles Pic and Pastor Maldonado at the Leows hairpin, the Dutchman and Maldonado both needing new front wings.
The field ran nose-to-tail as the narrow streets made overtaking near impossible. With drivers more concerned about looking after the tyres, the only major incident in the first stint was Charles Pic's fiery exit at Rasscasse as mechanical problems ended the Frenchman's home race.
With little movement and quite a slow pace being set by Rosberg out front, Mark Webber decided to move out of the pack pitting for tyres on lap 25. A few others also decided to pit for fresh rubber as the Mercedes showed little sign of pitting up front.
That was quickly ended however, as Felipe Massa suffered his second accident in as many days, the Brazilian again losing control on the approach to Ste Devote hitting the inside barrier before skating across into the wall at the corner exit.
That brought out the safety car for the first time this season and Massa had to be put into a neck brace following the relatively high-speed impact.
The rest of the field would use the opportunity to pit for fresh tyres in the pit stops Webber and Vettel were able to move ahead of Hamilton, demoting the Mercedes to fourth but still behind the leader Rosberg.
As the safety car pulls in Hamilton quickly looked to take back the positions lost attempting a bold move on Webber at Rasscasse however the Australian defends well and the 2008 champion falls back into line.
After the first safety car period it was Sergio Perez showing his aggressive skills producing a brilliant move up the inside of team-mate Jenson Button into the chicane.
With the field so close it wasn't long before Perez was challenging Fernando Alonso for sixth, again Perez looks down the inside into the chicane, Alonso cuts the corner as the pair go side-by-side, the stewards would investigate if Alonso gained an advantage.
Suddenly the second big crash of the race brought out the red flag as Max Chilton moved across on Pastor Maldonado on the approach to Tabac, the Williams was clipped into the air and skidded into the protective barrier at high speed, dislodging it from the main barrier.
The red flag was called to replace the barrier and the cars, led by Rosberg, moved round onto the grid.
With 31 laps to go the race resumed with an initial lap behind the safety car with Rosberg able to pull out a small gap over Vettel behind.
With tyres expected to last the remaining laps it was now a straight fight to the finish. Hamilton was still unable to get ahead of Webber while the stewards had told Alonso to let Perez through as they deemed the Spaniard did gain an advantage by cutting the chicane.
Perez remained racy after the stoppage trying to overtake Raikkonen into the chicane, the pair both skipped the chicane over time neither gaining an advantage over the other.
Adrian Sutil in the Force India also began to move through the field, two great moves on Jenson Button and Fernando Alonso at the Leows hairpin moved the German up to seventh spot chasing Perez and Raikkonen up front.
Jules Bianchi's first Monaco Grand Prix came to abrupt end on lap 62, the Frenchman losing the rear under braking into Ste Devote and spinning down the escape road into the barrier.
The final safety car of the day was caused by another Frenchman as Romain Grosjean misjudged his braking exiting the tunnel, slamming into the back of Daniel Ricciardo and forcing the Australian out of the race. Grosjean would also retire with suspension damage.
Entering the final 10 laps and Perez continued to pressure Kimi Raikkonen, the Mexican was able to get a tow through the tunnel and looking to make a move into the chicane, Raikkonen comes across forcing the McLaren to make light contact with the barrier.
Raikkonen was forced to pit after sustaining a puncture while it appeared Perez could continue despite a damaged front wing. Other damage had been caused however and a few laps later his suspension appeared to fail at Rasscasse, slipping wide allowing the train of cars behind through as Perez pulled to the side of the track.
Up front it was plain sailing for Rosberg as the German eased to his second career win ahead of compatriot Sebastian Vettel, Webber was able to hold off Hamilton as Red Bull achieved two cars on the podium.
Sutil came home fifth ahead of Button, Fernando Alonso a disappointing seventh for Ferrari, Jean-Eric Vergne finished eighth for Toro Rosso ahead of Paul di Resta while Kimi Raikkonen passed three cars in the final two laps to take 10th for Lotus.
In the championship Vettel now has a 21 point lead ahead of Kimi Raikkonen, Alonso remains third a further eight points back. Hamilton, Webber and Rosberg complete the top six.
The next race is in Montreal, another street-style circuit only much faster than Monaco and again known for safety cars and incidents, most F1 fans can't wait!
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