Sir Jackie Stewart believes Max Verstappen has some growing up to do after his explosive crash with Lewis Hamilton. But Stewart does not believe the Dutchman, 23, who was held responsible by the stewards, was entirely to blame. Hamilton was handed a 10-second penalty for that incident, but Verstappen, who leads his rival by five points in the table, will serve a three-place grid penalty in Sochi a week on Sunday. Stewart told Sportsmail: ‘Verstappen is taking longer than expected to mature. ‘The stewards have more information, but if they were so certain Verstappen was entirely to blame then why does he only get a three-place penalty?

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