Abu Dhabi: Nico Rosberg completed a hat-trick of victories to end the Formula One season when he won the Abu Dhabi Grand Prix on Sunday, while his Mercedes teammate Lewis Hamilton was left frustrated by a tire strategy which he believed cost him a shot at winning.
Rosberg won by 8.2 seconds at the Yas Marina circuit to complete Mercedes' 12th one-two finish of the season, establishing a new F1 record.
Ferrari's Kimi Raikkonen was third, ahead of his teammate Sebastian Vettel, who drove impressively after starting 15th on the grid. Raikkonen's podium secured him fourth in the drivers' championship ahead of fellow Finn Valtteri Bottas.
Force India's Sergio Perez and Nico Hulkenberg finished fifth and seventh in Sunday's race, separated by Red Bull's Daniel Ricciardo.
Felipe Massa of Williams was eighth, Romain Grosjean ninth in his last race for Lotus before moving to 2016 newcomer Haas, and Daniil Kvyat of Red Bull took the last point in 10th.
Rosberg finished the season on a high, with three consecutive wins and six straight pole positions, but it came too late to prevent Hamilton taking his third drivers' championship.
"I am excited about how the end of the season went," Rosberg said. "Next year can come tomorrow for me, I don't need any holidays. I'll try and keep the current form going next year. I am sure the team will give us a great car once again."
Rosberg started from pole and pushed his lead over Hamilton out to 4.7 seconds before the first set of pit stops. The German suffered from tire graining late in his second stint, with Hamilton cutting the deficit from 7.1 seconds - on lap 15 of 55 – to 1.3 seconds when Rosberg pitted for the second time at the end of lap 31.
The victory was up for grabs at that point, and it was expected Hamilton would immediately pit and make it a tight race to the finish, but instead the team elected to keep him out on track for another 10 laps.
Having gone that long, Hamilton asked over the radio whether he could attempt to race to the end on the current tires and try to hold off Rosberg on fresher rubber, only to be firmly told by the team that "it wouldn't work."
He pitted after lap 41 but instead of switching to the softer option tires for the last 14 laps, Hamilton was fitted with another set of the harder prime tires and stood no chance of making up the deficit.
"I don't really understand it, I came out 11 seconds behind and had a mountain to climb," Hamilton said.
"In hindsight, once Nico had pitted I would have backed off a bit and made those tires go a lot longer. The tires were still fine at the end. So I honestly felt I could have potentially taken them to the end. Going too long was probably not the right thing to do. Some part of me wishes I just gave it a go."
There were mixed messages after the race, with Mercedes team principal Toto Wolff saying "we gave Lewis the option to choose which tire he wanted on the car at the last pit stop" but Hamilton said "it was down to the team."
Wolff said "even though the car was light, it wouldn't have lasted to the end with options."
The only major incident of the race came at the first corner. McLaren's Fernando Alonso made contact with the Sauber of Felipe Nasr and hurtled out of control into the blameless Pastor Maldonado of Lotus.
Alonso was held responsible by stewards and given a pit drive-through penalty. The Spaniard said the decision reflected a disciplinary system that lacked consistency and common sense.
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