Sauber
Team statement: “It was an unusual Friday for the United States Grand Prix in Austin. During the first practice session test and reserve driver Raffaele Marciello was back in the cockpit for the fourth and last time this season – after Malaysia, Spain and the UK. Austin rookies Marciello and Marcus Ericsson were able to cover some mileage on the Circuit of the Americas in both wet and damp conditions. Raffaele Marciello completed 19 laps, whereas Marcus Ercisson put in 18 laps mainly on intermediates. In the afternoon it was not possible to run FP2 due to the severe weather conditions. Therefore, Felipe Nasr was not able to put in any laps today.”
“For tomorrow the weather forecast is expected to be similar to today.”