Felipe Massa placed Williams on top for the final day of the Formula 1 pre-season testing Jerez test, heading Fernando Alonso and Force India reserve driver Daniel Juncadella at the end of the day’s running.
Teams were unable to complete late-session runs after Kevin Magnussen hit the barriers at Turn 10, bringing out a red flag that would last until the end of the session.
Massa’s fastest time was over nine tenths quicker than Alonso could manage and nearly 15s quicker than the slowest major lapper, Caterham’s Kamui Kobayashi.
“Today we didn’t have any issues with the car which I think is also another step forward. We now need to concentrate and prepare with an aim to do more laps per day in Bahrain,” Massa said.
“Overall, I’m happy with my first days with Williams and I’m pleased with what I have seen in the team this week,” He said.
“For sure it is important to be competitive, but testing is testing, and we now need to look to prepare for Bahrain and then towards the first race, which is the most important thing.”
The final day of the test saw no relief in mechanical issues for Red Bull, who could manage only seven laps in the entire day.
It meant Red Bull had completed 21 laps in all four days while the highest-lapping team, Mercedes, completed 309 in that same period.
Toro Rosso, Red Bull’s sister team, struggled to operate on the final day of the first test as well.
Daniil Kvyat managed just nine laps before coming to a halt at Turn 10, an issue that saw him sit out the remainder of the day.
Full results below