Mercedes' Valtteri Bottas topped the first practice session at Barcelona, Spain. The Azerbaijan Grand Prix winner was faster than Vettel and Leclerc as both Mercedes and Ferrari trialed their car upgrades. The Finnish Mercedes driver enjoyed his heavily upgraded W08 to set the fastest time, even though in the end it turned out to be just a tenth quicker than Vettel best. Things didn't go fully according to plan though as Bottas was stuck in the garage in the final part of the session with a suspected hydraulic leak. Lewis Hamilton ended up 4th and was more than half a second down on his team mate. Still, no one else really came close, with the fastest Haas in the hands of Grosjean another...
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