Jenson Button was the quickest driver on Friday at the Spanish Grand Prix.
For the second session in a row Sebastian Vettel was second-fastest for Red Bull.
Fernando Alonso led the early running on hard tyres. But several teams made an early switch to the softer rubber, beginning with the two Toro Rossos. Vettel’s soft-tyre run put him fastest initially on a 1’23.563.
Button had complained of “unbelievable” understeer when lapping on the hard tyres. He looked much more at ease with the softs, and took over at the top from Vettel with a lap of 1’23.399.
Romain Grosjean set the fastest time in the first sector but caught Massa and Pic at the end of his lap and lost time, crossing the line with a 1’23.964.
Team mate Kimi Raikkonen pipped his effort by less than five hundredths of a second. That came just moments after Mark Webber had slithered off the track at turn four, and dumped a large quantity of gravel on the track when he returned.
Alonso abandoned his first run on soft tyres so that having been fastest earlier in the session he ended it 14th.
Several drivers struggled for grip in the race simulation stints at the end of the session. Lewis Hamilton went off twice at turn 13, Bruno Senna following him off on one occasion. Senna then had a spin of his own at turn 12.
Narain Karthikeyan failed to set a time as has team tried to solve the electrical problem experienced in the first session. He emerged from the pits only to coast to a stop at turn three.
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Image ?é?® McLaren/Hoch Zwei