Haas says Grosjean's front wing didn't fail in Canada

Grosjean has suffered front wing failures both in testing and during the Bahrain and Spanish Grands Prix this year, and had to replace the wing again during the Montreal race.

But rather than being a structural problem, Steiner says the wing had been damaged after Grosjean made contact with teammate Esteban Gutierrez at the start of the race in Canada.

Steiner admitted the team took the decision not replace it, thinking it would last until the end.

"It was damaged when they got together at the start," Steiner said. "Esteban and Romain got together and then we saw that there was damage on the pitstop but we thought - wrongly - that it would last and it didn't.

"The cascade came off. But the crash was not a failure. It was damage. We actually had two picture at the pitstops and we knew there was damage and we decided not to replace it because we were thinking that it would last, but it didn't."

The team boss said he was confident there would be more more issues with the wings.

When asked if he was worried about the situation, he said: "No, to be honest, no. But, then again, I cannot say no because maybe it breaks tomorrow, so I don't want to say it's all sorted, because it's almost always something different.

"We are confident it doesn't happen, but if it happens tomorrow, I need to tell you why. It will be something different again, but at the moment I'm not concerned."

Despite the contact between his two drivers, Steiner sees no need to discuss the incident.

"It's a start. It's a sport. It's competition. They both want to be in front. Sure, they shouldn't try to run into each other, but I don't think I have to tell them that.

"I don't think I have to tell them. It was racing. It was a start. Sometime you don't have to make a big deal out of things, which is part of the sport."

Additional reporting by Valentin Khorounzhiy