Sebastian Vettel will start the United States GP at very back of the grid as Aston Martin are fitting his AMR21 with a new ICE as well as other parts. Vettel is joining an ever-growing list of drivers requiring a fourth hybrid system with F1's regulations stating only the first three are free, after that it is penalties for the drivers. A new ICE means a 10-place grid drop, while taking on any additional parts – as Aston Martin plan to do – means he will be starting at the back of the grid. The German confirmed the penalty when he addressed the media ahead of the US weekend. 'I think we are heading into, let's say, a difficult weekend,” Vettel said. 'We are changing the...
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