Austria has been the latest as far as the scheduled performances of Kubica in the opening practice sessions of the weekend is concerned. The reserve driver of Williams for 2018 the Pole replaced Sergey Sirotkin and finished 38 laps. There is no doubt that Williams has had tough times this year and in the previous two sessions as there was a car at the bottom. Lance Stroll was in FP2 and Kubica in FP1. In the session held on last Friday, Kubica said the strongest characteristic of the car was the engine, power unit.