Valtteri Bottas says Williams should have been more aggressive with its strategy after both himself and team-mate Felipe Massa lost out on the chance of a podium in the United States Grand Prix.

Bottas started the race from third position, but after being beaten to the first corner by Massa, was overtaken by a charging Daniel Ricciardo in the Red Bull through the pit-stops, the Australian repeating a similar move on Massa to finish third.

Indeed, though the result consolidates Williams' third place in the constructors' reckoning, the Finn says he had aimed to finish higher than his eventual fifth place around the Circuit of the Americas.

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"The first thing for me was the start, with the clutch we were not aggressive enough. There was more grip from the tyres and track than we were setting the clutch for, so we lost one place there. Then we lost one position with strategy, so we definitely should have been more aggressive today if we wanted to be third and fourth.

"We just need to finish in a good points with both cars with the two races remaining, so that should be enough [to secure third overall] at this point. We just need nice, consistent weekends, but personally I targeted much higher than fifth and I really hoped to be fighting for the podium.

Reflecting on the performance of Ricciardo, Bottas admits Williams were caught out by the pace of the Red Bull come race day.

"From our simulations we thought we would be a little bit quicker than them, so they did not have the chance to attack us with the strategy. At the end of the first stint, Daniel got really close and it seemed like at the end of the stints, especially with the option tyre, they were much better than us."

Finishing ahead of Fernando Alonso and Sebastian Vettel, Bottas has consolidated his fourth place in the standings with only Brazil and Abu Dhabi remaining.