After the Hungaroring briefly masked the SF1000's problems at the last race, Vettel and Leclerc are braced for two difficult weekends at one of the most power-sensitive circuits on the calendar.
Ahead of the British and 70th Anniversary races at the track, a concerned Leclerc said: "I think we expect two quite difficult weekends on paper.
"I always try and like to be optimistic, so I'll have the same mindset going into the weekend, but realistically it's going to be pretty difficult."
Vettel agreed with the assessment of his team-mate, adding: "It's probably the right way to look at it. I think on paper it is not the track where we should be strongest with the current package that we have, but we are here to race.
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