Red Bull under investigation over wing

A report issued by Jo Bauer, the FIA's technical delegate, after qualifying stated that he believed the front wing flaps on the Red Bull cars of Sebastian Vettel and Daniel Ricciardo flexed at high speed.

A statement issued by Bauer after qualifying said: "When checking the front wing of car numbers 01 and 03, it was found that the front wing flaps were designed to flex under aerodynamic load.

"In my opinion this is not in compliance with Article 3.15 of the Formula One Technical Regulations.

"Therefore, I am referring this matter to the stewards for their consideration."

Representatives of Red Bull have been summoned to see the race stewards to explain the situation.

If the stewards agree with Bauer that the cars are illegal, then Vettel and Ricciardo face exclusion from qualifying and would have to start the race from the back of the grid.