Romain Grosjean did nothing wrong in Hungarian GP, says Lotus

Grosjean had been one of the pre-race favourites at the Hungaroring, but his hopes of a headline result were dashed by a drive-through penalty for overtaking outside the track limits.

After the race, he was handed a 20-second time penalty for causing a collision with Jenson Button as they battled for position.

Grosjean's speed this season has been impressive, but questions remain over whether he is the complete package given the number of incidents involving him.

Boullier is convinced about the Frenchman though - and reckons rivals try to bully him to take advantage of the fact he cannot afford to get caught up in crashes.

When asked by AUTOSPORT if he was worried that Grosjean had had another incident-filled race in Hungary, Boullier said: "No. To be honest, I have a different view.

"I know Romain was under fire last year, and you could see [Sebastian] Vettel's move at the start was a bit on the limit.

"He [Grosjean] was clearly next to him and, if you have a car next to you at this place, you cannot expect to pass him.

"So that was not fair to try and go banging wheels with him.

"To be honest, I don't see anything wrong with Romain. It was another brilliant weekend and I am happy with that.

"It is two in the row, so that means clearly now he knows what to do.

"He is already fast and can deliver, so he will build on this and get stronger and stronger."