Nico Hulkenberg says he has plenty of work to do after ending Friday practice very unhappy with the balance and set-up of his Force India, having missed the morning session with development driver Alfonso Celis Jr stepping in.

The German driver ended his only session of Friday practice 12th overall and despite his best lap being a tenth up on team-mate Sergio Perez he was not content with the pace or set-up of his VJM09.

ITALIAN GRAND PRIX - Free practice results (2)

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With the unique and tricky set-up Monza demands, Hulkenberg says working the low downforce package into a competitive shape has proven a bigger challenge compared to most circuits and may have appreciated the additional practice session to refine the balance with his Force India.

"In the afternoon I don't know. We're not there with the car and the balance - where we want to be - so some homework to be done. It's just crap," Hulkenberg said. A bit of both [front and rear]. At the moment we're not very happy with it so we've got a bit of work to do and a bit of tuning.

"I hope that we can get there. Obviously we have collected quite a bit of data now and we need to go through stuff and see what options we have available and work out something that hopefully works better tomorrow."

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The former Le Mans 24 Hours winner will be aiming to carry the momentum from his career equal best finish of fourth place at Spa last weekend as Force India looks to strengthen its grip on fourth in the F1 constructors' championship ahead of Williams.

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