McLaren race director Eric Boullier admits that Stoffel Vandoorne's performance level this year has been disappointing.
Vandoorne has been outqualified by team mate Fernando Alonso at every race this year, and generally performed under par compared to expectations, and taking into account is impressive credentials garnered in the junior category.
McLaren is committed however to help the Belgian however improve his form.
"His form is not as good as expected, as we were all expected," Boullier told Sky F1's Simon Lazenby.
"He had a pretty high track record in the junior categories, he won everything he went through like Lewis. He's very talented.
"It's true that we didn't give him 100 percent to do well because he had a lot of issues on his car and it was quite recurrent but we are now addressing this properly to help him drive the car the way we designed the car and the way we want him to drive to be fast.
"I'm confident he will achieve this. All the young drivers, starting with Verstappen, all struggling in the first six months."
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