Silverstone (dpa) - After his debacle start in this Formula 1 season, Sebastian Vettel's perplexity spreads.

"It is not possible that everything runs backwards overnight," said the four-time world champion after the first of two Grand Prix at the Silverstone Circuit in England. "Something has to be." The 32-year-old says he feels "not at all comfortable" in his Ferrari. After four races, Vettel only has ten points on his account and is only 13th in the drivers' standings.

One now has to "work up a bit and hope" that it will "get better" again, commented Vettel. The Heppenheimer has to leave Ferrari at the end of this season. His Formula 1 future remains open. Formula 1 celebrates its 70th anniversary in Silverstone with the Grand Prix on Sunday (3.10 p.m. / RTL and Sky): on 13 May 1950, the premier class of motorsport drove its very first world championship race at the former airfield in north-west London.

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Formula 1 driver field

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Timetable in Silverstone

Information about the Silverstone course