McLaren’s Sergio Perez set the fastest time on day two of the second pre-season test in Barcelona.
The Mexican driver completed 97 laps and set his fastest time on the soft compound tyre.
Sebastian Vettel set the second fastest time after 84 laps, his fastest time in the Red Bull also coming on the soft tyre.
Red Bull attempted to complete a race simulation in the afternoon but this was disrupted after the car stopped out on track causing a red flag.
Kimi Raikkonen spent much of the morning in the pits after his E21 needed a gearbox change. He eventually managed 43 laps and the third fastest time on the medium tyre.
Behind him Lewis Hamilton set the fourth fastest time on the hard compound tyre ahead of Fernando Alonso who set the fifth fastest time.
Valtteri Bottas set the sixth fastest time on his first outing in the FW35 ahead of Daniel Ricciardo, Paul di Resta and Nico Hulkenberg.
Max Chilton set the 10th fastest time ahead of Charles Pic in the Marussia, who managed 102 laps.
It should be remembered that the times set in testing are unlikely to be a true gauge of each cars performance.
Testing continues in Barcelona tomorrow where Mark Webber, Romain Grosjean, Jenson Button, Jean-Eric Vergne, Giedo van der Garde and Luiz Razia will all test in place of their teammates. At Force India Adrian Sutil will test for the team, his first time driving a F1 car for over a year.
For full times, laps completed and tyre compounds see http://www.autosport.com/news/report.php/id/105640.