Romain Grosjean continued his run of strong results with a superb second in Austin, having got ahead of Mark Webber at the start and survived intense pressure from the Australian in the closing laps.
It was Grosjean’s fourth podium in five races, but his first second place of the season.
“I think the strategy was pretty clear,” he said of his efforts to stay in front. “We were copying what Mark was doing. When he was pitting for hard tires, we pitted for hard tires, if he was pitting for prime or option. Then in the race I was just trying to make as much gap as I could before the DRS zone, so turns eight and nine are pretty hard to follow another car.