Race one polesitter Romain Grosjean has been banished to the back of the grid for Sunday's GP2 Series sprint race at the Hungaroring after it was alleged he was at fault for Giorgio Pantano's Saturday spin.

Having made a tardy getaway from the front of the grid - losing places to Lucas di Grassi, Vitaly Petrov, Andi Zuber and Bruno Senna in the process - Grosjean's twitchy ART car appeared to be holding up those behind it before the Frenchman ran off the road at turn four on lap two.

Sensing an opportunity to get past and close the gap on his championship rivals, Pantano was turning into turn five when the two cars made contact, sending the Italian into a spin that dropped him to the back of the field and out of any chance of scoring points. With di Grassi winning and Senna taking third, Pantano saw his championship lead slashed and, with a 14th place start looming for Sunday, could see it reduced even further in the sprint event.

Despite the incident appearing to have been caused by Pantano turning in slightly to early, having not cleared the front of Grosjean's recovering car, the Frenchman was handed a ten-place grid penalty for the sprint race, having been adjudged to have 'caused an avoidable collision'.

Super Nova's Alvaro Parente will join Grosjean on the back row after he too was handed a ten-place penalty for overtaking under yellow flags and causing an avoidable crash with Ho-Pin Tung.