The chassis used by Sebastian Vettel in the first four races of the 2014 Formula 1 world championship season was bent, according to Auto Motor und Sport.
The reigning quadruple world champion notably struggled alongside fresh-faced teammate Daniel Ricciardo until Spain, where he spectacularly scythed through the field and declared for the first time that driving in 2014 is fun.
Although no obvious chassis flaw was found between the Chinese and Spanish Grand Prix, Red Bull nonetheless put Vettel at the wheel of the winter testing chassis in Barcelona.
'I do think it made a difference,' the German declared after the race.
Auto Motor und Sport correspondent Michael Schmidt said further...
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