The second session didn't look as strong, it was easy to overheat the tyres and that was making it harder to be consistent.
It was a good day, with a positive FP1 and really good FP2 in terms of qualifying as well as race pace.
Overall it wasn't easy out there today, the track is quite bumpy and to find the right compromise on the car hasn't been the easiest but there are a few positive things to look at.
Higher temperatures, traffic and the ongoing crackdown on track limits make it difficult to evaluate the true pecking order in Austin, but, that said, Mercedes appears to have it covered.
Times from today's second free practice session for the Aramco United States Grand Prix.
As Valtteri Bottas takes on his sixth ICE of the season, there is growing concern over the reliability of the Mercedes power unit, though Toto Wolff doesn’t appear overly oncerned.
Clear straight-line speed advantage sees the Mercedes pair outshine Max Verstappen by almost a second as US GP weekend gets underway.
Times from today's opening free practice session for the Aramco United States Grand Prix.
Williams has recruited American F3 driver, Logan Sargeant to its Driver Academy.
Following claims that Sydney is considering a bid to host the Australian Grand Prix, event boss, Andrew Westacott says he is "not surprised" by the move.
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