Ferrari set the pace in Turkish Grand Prix free practice on Friday, with Brazilian Felipe Massa fastest in the morning and world champion team mate Kimi Raikkonen top of the timesheets in the afternoon.
In a second session halted briefly after Australian Mark Webber crashed his Red Bull, Raikkonen lapped in one minute 27.543 seconds.
That compared to Massa's best time in the morning of 1:27.323.
Ferrari are chasing their fourth win in a row on Sunday.
Championship leader Raikkonen, winner of two races this season already, had completed only three laps before lunch due to a gearbox problem but he made up for the setback with 30 laps in the afternoon.
Massa, chasing a Turkish hat-trick after winning from pole position at the Istanbul Park circuit for the past two years, was only third fastest in that session.
McLaren were second quickest in both with Finland's Heikki Kovalainen second in the morning and 23-year-old Briton Lewis Hamilton, nine points behind Raikkonen in the standings after four races, taking that slot in the second stint.
Webber had a morning time of 1:30.088 for 16th place and his best before the afternoon crash was 1:29.633 for 19th.
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