Romain Grosjean opened up testing for Haas F1 Team on a cold and overcast Monday at Circuit de Barcelona – Catalunya. The Frenchman ventured onto the 4.655-kilometer (2.892-mile), 16-turn track at 9:10 a.m. local time and when the day was complete, Grosjean had racked up 55 laps behind the wheel of the Ferrari-powered Haas VF-18 to log 256.025 kilometers (159.086 miles).

Grosjean’s best time was a 1:22.578, earned on his 48th lap with a new set of Pirelli P Zero Yellow soft tires. The quick time put the seventh-year Formula One pilot 10th among the 13 drivers participating in the first day of testing.

Grosjean began with a series of reconnaissance runs before a 12-lap stint on the White medium tire generated a quick time of 1:23.092. A 13-lap run on Yellow softs was completed prior to the lunch break, with Grosjean recording a best time of 1:23.453 on the slightly softer tire compound. A total of 32 laps were logged in the morning session.

After a four-lap reconnaissance run on White mediums to start the afternoon session, the VF-18 was outfitted with a new set of Yellow softs for a 16-lap stint. It was here where Grosjean secured his fastest lap of the day.

Deteriorating weather conditions as the afternoon wore on cut short any additional running time. Intermittent drizzle turned to light rain, and combined with a temperature hovering at 5.6 degrees Celsius (42 degrees Fahrenheit), no useful information could be gleaned.

Red Bull’s Daniel Ricciardo set the day’s quickest time (1:20.179) and ran the most laps (105).