Pastor Maldonado set the quickest time as Formula 1 testing continued on Wednesday morning at the Circuit de Barcelona-Catalunya in Spain.
The Venezuelan driver set a series of rapid times, the fastest being a 1.26.311 to leave him comfortably top of the standings.
Kimi Raikkonen enjoyed a more productive morning in the Ferrari F14T and he ended in second.
Nico Rosberg was third quickest as Mercedes trialled a 'megaphone' exhaust early on in the running, which had little audible effect.
Esteban Gutierrez's running was briefly interrupted by a small fire but he still set the fourth fastest time.
Daniil Kvyat’s Toro Rosso stopped at turn three early on in the session and he ground to a halt again when he returned to the track. He returned to the circuit for the final 10 minute of the session and eventually registered a lap time.
Reigning world champion Sebastian Vettel only appeared during the final hour of the session while Jules Bianchi took over testing duties from Max Chilton
Susie Wolff began her preparations for her practice outing at Silverstone but spun off at turn 10 on her sixth lap. She was able to return to the circuit later in the morning.
McLaren gave youngster Stoffel Vandoorne his first experience in a Formula 1 car and he conducted tyre testing at the behest of Pirelli.
Daniel Juncadella spun into the gravel on the exit of turn four having also been trialling Pirelli tyres.
Caterham did not run following the damage sustained to the car by Kamui Kobayashi on Tuesday.
|5||26||Daniil Kvyat||Toro Rosso-Renault||1.29.017||18|
|6||1||Sebastian Vettel||Red Bull-Renault||1.29.027||14|
|10||34||Daniel Juncadella||Force India-Mercedes||1.31.737||20|