US grand prix 2015 Winner Is Lewis Hamilton
Rosberg was so rapid at this point he was extended his lead by almost 3s per lap, while Hamilton’s pace was restricted by Ricciardo ahead of him. He passed him at Turn 12 on lap 26, but was over 10s in arrears behind leader Rosberg.
Vettel passed Kvyat for fourth on lap 24 at Turn 1.
The Safety Car was then required to retrieve Marcus Ericsson’s stranded Sauber, Vettel taking the opportunity to pit. Vettel’s right-front change was slow, and he rejoined on the medium-compound tyre.
The fascinating middle phase
The race restarted in the order: Rosberg, Hamilton, Ricciardo and Kvyat, with Vettel running fifth on a brand-new set of mediums knowing that those ahead would have to stop again. Verstappen, in sixth, opted for a fresh set of softs during his Safety Car pitstop.
At the restart, Kvyat locked up and ran wide at Turn 1, allowing Vettel up to fourth.
Rosberg, meanwhile, scampered away up front, as Vettel grabbed third from Ricciardo when the Australian ran wide at Turn 12, only for Ricciardo to fight back past him at Turn 13 after Vettel himself made a mistake.
Vettel made the move stick through Turn 1/2 on the next lap, after Ricciardo ran wide. Verstappen passed Kvyat, who went off at Turn 12 and allowed Hulkenberg (who had pitted for fresh mediums under the Safety Car) passed him to take sixth.
Verstappen then passed Ricciardo for fourth, before Hulkenberg clanged into the side of Ricciardo on lap 36, taking himself out of the race.
Out front, Hamilton began to close the gap on Rosberg with 20 laps to go, and was in DRS zone by lap 35. Vettel was 8s in arrears at this point, under no threat from Verstappen.
Kvyat DRS-ed past Ricciardo just before another VSC was required to retrieve Hulkenberg’s stranded Force India.
That allowed Rosberg to pit, ruining Vettel’s best hope of victory, with Hamilton staying out – any hope of him sealing the title today seeming lost. Kvyat and Ricciardo pitted, Red Bull stacking their cars briefly.
Hamilton restarted without getting the chance to pit under the VSC, leading the race by 4.9s over Vettel. Verstappen was third, ahead of Rosberg, with Button up to fifth, ahead of Perez.
Rosberg outdragged Verstappen on the back straight to take third on lap 40, and was in striking distance of Vettel. He took 2.4s out of Vettel on lap 41 alone, and DRS-ed past him on the backstraight on the following tour.
Button and Alonso were up to fifth and sixth, but the race was interrupted again as Kvyat crashed out exiting the penultimate corner. “Sorry, guys,” he said, shaken but unhurt.
Hamilton got his crucial ‘free’ pitstop as the Safety Car was called upon again, rejoining behind Rosberg but ahead of Verstappen.
Vettel also pitted for softs, only losing a place to Verstappen.
The crucial charge to the finish
The race restarted again with 10 laps to go with Rosberg leading Hamilton by 1.1s, ahead of Verstappen and Vettel. McLaren’s Jenson Button pitted from fifth, promoting Alonso, Perez and the damaged car of Ricciardo.
Vettel outpowered Verstappen on the backstraight for third, while Rosberg extended his lead to 1.6s over the first post-restart lap, with the Ferrari of Vettel already 3s back.
But then Rosberg made his crucial mistake and went off at Turn 17, handing the lead to Hamilton on lap 47 – and effectively the championship too. “I don’t know what happened,” he rued post-race.
The Briton took a 2.6s lead, which Rosberg was unable to do anything about as he slipped back towards third-placed Vettel.
Vettel got DRS on Rosberg on the last lap, locking up and sliding wide at Turn 1. He finished right behind his fellow German at the finish.
Verstappen finished a distant fourth, ahead of Perez. Sainz passed Button for sixth with a couple of laps remaining, but has a 5s time penalty for speeding in the pitlane.
The Spaniard had earlier barged into Ricciardo under braking at Turn 12, Ricciardo then tumbling back down the order.
Sainz dropped behind Button when the penalty was applied, with Pastor Maldonado (Lotus), Sauber’s Felipe Nasr and Ricciardo rounding out of the points scorers.
A power-sapped Fernando Alonso was 11th, having run as high as fifth, while local hero Alexander Rossi finished 12th.