Newly-crowned quadruple world champion Sebastian Vettel showed no signs of easing off as he led a familiar Red Bull one-two in free practice for the floodlit Abu Dhabi Formula One Grand Prix on Friday.
The 26-year-old German, who secured his fourth successive title in India last weekend and will be chasing a seventh race win in a row on Sunday, scorched around the Yas Marina circuit with a best time of one minute 41.335 seconds in the evening session.
Australian team mate Mark Webber was 0.155 slower.
“It's difficult to say today how we compare to the others, we know the Lotus is quick here, but we also had decent pace today,” said Vettel of his day's work.
“It's not always so easy at this circuit with the conditions changing throughout the day; we start in the sun and finish at night and the track temperature changes during that time. But, no big issues, so I'm pretty happy.”
Lotus's Romain Grosjean, whose team mate Kimi Raikkonen won last year's race, was fastest in the searing afternoon heat in 1:44.241 but had a front brake failure under the floodlights.
Force India's Paul Di Resta and McLaren's Jenson Button both suffered punctures.
Lewis Hamilton, winner in 2011 and twice on pole at the circuit, was second quickest for Mercedes in the opening session, just 0.192 slower than Grosjean, and third in the evening.
Raikkonen, who revealed he had considered not turning up in Abu Dhabi over unpaid wages and other issues with the team, was sixth and fourth fastest respectively.
Grosjean has beaten Raikkonen in the last two races and finished on the podium in the last three.