sebvettelnews.com
Vettel: I’m quite confident we can improve the car.
FP1: P2, 1:34.226 (+ 0.169), 20 laps | FP2: P4, 1:33.890 (+ 0.658), 35 laps Sebastian Vettel: “It is always good fun here in Austin. The track is not in the best shape because of its bumps. But it…