Nico Hulkenberg admits it was tricky to get immediately up to speed in an F1 car again following his Le Mans 24 Hours exploits a week earlier, even if he proved quick enough for sixth best in Austrian Grand Prix free practice.

The Force India driver was turning his first wheel in an F1 car since clinching victory in the round-the-clock classic last weekend, the German admitting the opening laps would prove difficult as he re-adapted to the rigours of a single-seater.

Nonetheless, Hulkenberg was soon back up to pace in FP2, turning in the sixth quickest lap in current generation VJM08, which is being phased out after this race for the new B-spec version.

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"Generally we made good progress during the day," he said. "During build up in the morning, it took a while to get in the groove - it felt like I had driven something else for quite a few laps! But then back to business really. I think we learned a bit today, it was a pretty straight-forward day, no issues."

Though Force India is running an uprated version of its Mercedes engine this weekend, Hulkenberg played down its effect in hauling Force India up the order, insisting much is down to its own set-up tweaks.

"Generally the soft tyres suit us more than the hard tyres. It is an engine track so we are covered there, then generally in the last few weeks we have found better set-up solutions for our car that make us look a little better, but I don't want to price this weekend too early, I think it will be tight and tough for us to be in the points this weekend."