Toto Wolff has slammed Red Bull's Dr Helmut Marko for alleging that Mercedes is receiving special treatment by F1 tyre supplier Pirelli. Already, Sebastian Vettel has suggested the new, thinner tyre tread supplied by Pirelli in Barcelona was a cause of Ferrari's sudden struggle. 'You don't have to be a genius to understand that the tyres get harder when you scratch off 4 millimetres. That's how other teams got on better than we did,' the German told Bild newspaper. Red Bull's Marko agrees: 'The tyres were changed at the request of Mercedes. 'When you're a team and a manufacturer at the same time, you can do that. 'We produce energy drinks,' he continued to Auto Bild. 'Of course we cannot...
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