After completing 206 laps during the first test last week, it was Haas F1 stalwart Romain Grosjean that had the car all to himself on Day 4 of winter testing, completing another 107 laps during a trouble-free day for the American outfit. The Frenchman steered his VF-20 past a century of laps as the Haas F1 Team were the only marque to use just the one driver today. Grosjean managed to run a total of 42 laps in the morning whilst simultaneously working on aero developments and baseline settings on the Pirelli C3 tyre. He would go on the test the C4 tyre in the afternoon session, adding a futher 65 laps to complete a successful outing for the team. His fastest lap of the day was a 1:18.670,...
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