From GMM

Red Bull have identified a broken roll-bar as the reason for Sebastian Vettel's lack of pace during Q3 in Turkey. That meant the RB6's front wheels locked, preventing the driver from replicating his fastest pace of Q1 and Q2.

Unlike general setup changes, or changes to the engine or gearbox, the Austrian team is able to replace the roll-bar before the race without incurring a penalty.

Ferrari's F10 car is suffering from a lack of recent development, according to Fernando Alonso.

The Spaniard failed to progress into the final Q3 segment of qualifying in Turkey, while his teammate Felipe Massa is just eighth on the grid.

The team newcomer is quoted as saying: "In China, Spain, Monaco and here (Turkey) we have not developed, while Red Bull, McLaren and Mercedes have all gone forwards."

Sections of the Italian media have hit out at Alonso for a sequence of driving mistakes. "Mistakes? I braked late to try to recover and the rear brake locked. If this is a mistake ..." he is quoted as irritably telling La Gazzetta dello Sport.

Cosworth is not in Rubens Barrichello or Lucas di Grassi's good books in Turkey.

Williams' Rubens Barrichello, just fifteenth on the grid at Istanbul Park, said the British team is "suffering" from a lack of power. "The engine that we brought did not work. The straightline speed is not good," he said.

Lucas di Grassi is also unhappy, having been outqualified by Bruno Senna of the struggling HRT team.

"My lap was good," said the rookie, who is finally at the wheel of Virgin's updated VR-01 car this weekend. "The car was good in the corners, but the engine was not working on the straights or in acceleration."

Di Grassi will have a fresh engine fitted for Sunday's race.