Romain Grosjean has been left baffled by the consistent brake problems that he is suffering at Haas. Since the mid-stages of last season, Grosjean has had a distasteful relationship with the pedal under his left foot, leading to frequent radio complaints.

Last time out in Baku was no different, as Grosjean was constantly heard complaining of his brakes. In the practice sessions, he was one of many drivers to take trips down escape roads, and in the race told his engineer that he didn't want to race if his brakes appeared to be dangerous.

"We didn't have the slightest hope of success the whole weekend. Now we need to ask ourselves questions and find answers," Grosjean added. "It's unacceptable that in the course of the five weekend sessions, the same problem on one car cannot be solved. At one point I even had doubts about my own safety. The situation is simply dangerous."

Fergal Walsh