"Something's definitely not right with the throttle. It's not how it should be," he said.
According to Sky Sports pundit Nico Rosberg, the issue appeared digital rather than mechanical.
"I’m assuming it’s not a mechanical thing, but more a digital thing that when he is putting throttle, the throttle is coming in too aggressively or there’s too big a hesitation in the first part when you need to be really precise," Rosberg added.