Kimi Raikkonen closed out the first collective Formula 1 test of 2017 at the top of the timesheets after setting the pace on a mixed day of running in Barcelona.
With no rain falling over the first three days of testing at the Circuit de Barcelona-Catalunya, teams agreed for the track to be made wet to allow Pirelli to gather data for its intermediate and wet tires.
Sunny conditions meant that the track dried out across the course of the day despite more water being laid down over lunch, with slick running possible in the afternoon session.
Raikkonen turned in a fastest lap of 1:20.872 to finish nine-tenths of a second clear of Red Bull’s Max Verstappen, giving Ferrari a second day at the top of the standings. Raikkonen also set the fastest time for the Scuderia on Tuesday.
Following Valtteri Bottas’ impressive Wednesday pace, Mercedes had a quieter day as the Finn only finished eighth-fastest. Teammate Lewis Hamilton opted not to run in the morning as planned after the team found an electrical problem on its car.
Jolyon Palmer led Renault’s charge in third place, running the afternoon after teammate Nico Hulkenberg completed his duties in the morning. Romain Grosjean was fourth for Haas and led the mileage charts with 118 laps under his belt.
Antonio Giovinazzi impressed once again for Sauber while standing in for the injured Pascal Wehrlein, finishing fifth. Sergio Perez was sixth for Force India.
McLaren had a better day after struggles earlier in the week, with Stoffel Vandoorne racking up 66 laps behind the wheel of the MCL32.
Toro Rosso was less fortunate, managing just a single lap due to an engine issue on its STR12 car, while Williams sat out entirely due to damage sustained to its car on Wednesday.
Testing resumes in Barcelona on Tuesday (March 7), with another four days scheduled to take place.