Racing in Europe for the first time this season although teams did visit in the snow for a pre-season test. This is the track where the dream came true for Verstappen and after a rocky start to 2018 he says that this weekend's race will define his season. That may well be true. Kubica will drive the Williams in Friday practice - his lap times might vindicate Sirotkin/Stroll in terms of the seemingly poor times they've extracted from the car thus far... or lead to a sacking. The European races are traditionally where the teams begin to add serious upgrades and several teams including Ferrari, Red Bull and McLaren will run considerably revised cars this weekend.