Red Bull’s new F-duct system in Turkey did not function “100 per cent” on its Friday practice debut.

USF1 will not launch a renewed bid to debut in formula one in 2011.

Bernie Ecclestone on Friday scotched renewed rumours about the future of the Turkish grand prix.

As the F1 calendar looks set to expand, the sport should consider culling Friday’s 180 hours of free practice.

Two touted contenders for victory in Sunday’s Turkish grand prix had a troubled afternoon practice session at Istanbul Park.

Adrian Sutil had a big crash at the end of Friday’s opening practice session in Turkey.

Rumours persist that this weekend’s grand prix will be the last in Turkey.

Red Bull Racing has played down suggestions Kimi Raikkonen was a serious contender for a seat in 2011.