Full FP1 times HERE
Lewis Hamilton set the fastest time of the opening practice session for the Spanish Grand Prix as Sebastian Vettel stopped on track.
With Jenson Button holding top spot in the closing minutes, Hamilton went 0.782s clear of the field with a 1:27.109 but complained over the radio later in the run that “the rear tyres are really taking a beating”. Button held on to second place for McLaren by just 0.082s ahead of Daniel Ricciardo's Red Bull as all of the teams tested upgrades.
However, there were problems with the other Red Bull as Vettel's session ended after just four laps when his car came to a halt on the exit of Turn 5. Vettel helped clear the car behind the barrier and then was seen using a fire extinguisher briefly at the rear before it was placed on the back of a recovery truck.
Nico Rosberg also didn't manage to get in a huge amount of running, being confined to the pits with an ERS cooling system issue after nine laps, but he still ended the session with the fifth fastest time. 0.040s ahead of him was Fernando Alonso in the Ferrari, watched by president Luca di Montezemolo who arrived halfway through the session.
The other Ferrari of Kimi Raikkonen was sixth fastest ahead Kevin Magnussen as both McLaren's showed well inside the top 10, while Pastor Maldonado was able to set the eighth fastest time for Lotus.
Giedo van der Garde was driving in FP1 in place of Esteban Gutierrez and he came close to a high-speed accident when he reported a brake failure at Turn 1, running across the gravel at speed before just avoiding the tyres on the outside of the corner.
Sergio Perez suffered a strange problem when his left wing mirror came loose on the exit of Turn 4. The mirror stayed attached by a tether and fell in to the cockpit, requiring Perez to hold it clear of the steering wheel with one hand and drive with the other back to the pits.
There were encouraging signs for Marussia as Jules Bianchi set the 16th fastest time just 2.6s off the overall pace and within two seconds of the rest of the field behind Hamilton.