Pirelli has backtracked on its initial theory about the tyre failures that plagued Lewis Hamilton and Carlos Sainz. The blame no longer rests on Valtteri Bottas’s Sauber running over Alex Albon’s discarded mirror. Instead, the culprit remains elusive.   The Qatar GP was a tyre punisher. The high-speed corners and relentless forces at Losail made the front left tyres the most stressed component on the grid. It was here that both Hamilton and ...

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