He told Channel 4: “I think it’s pretty clear that qualifying is his weakness, obviously at the moment.
“And also when there’s any change of conditions in the preparation build-up that make that more tricky for him to understand to get those clean laps in, he’s in all sorts of strife.
“So it’s a pack of cards. We’ve seen the qualifying Saturdays for him have not worked.”
Webber: Perez has to sort the mixed conditions out
Webber also explained that an F1 driver ‘has to deliver in all conditions’, urging Perez to build consistency.
He said: “Races, mate, anyone can move forward from there, even can I, that’s fine being an old fart like I am now. He has to sort qualifying out, he has to sort the mixed conditions out, and I think he’s going to be alright but at this level you have to deliver in all conditions.”