US race quotes: Pirelli

Paul Hembery: "The variation in temperature we saw over the course of the weekend was quite remarkable, meaning that the drivers encountered different track conditions in every session. With such a wide spread of asphalt temperatures, you would ideally need more than just the two compounds stipulated in the regulations, but these were highly unusual circumstances and that was obviously not an option!

"As a result, the teams did not really have a proper read on the wear and degradation rates heading into the race. Nonetheless, most drivers chose a one-stop strategy as we expected, helped by the safety car period at the beginning of the grand prix, which then led to a race with less strategy and fewer variables than we have been accustomed to recently."