Lewis Hamilton says he won't 'invest any energy' to rekindle a friendly relationship with former team mate and rival Nico Rosberg. As kids racing towards a dream, Hamilton and Rosberg grew up together on the competitive karting trail and through the junior ranks. But three years of bitter battles for the world championship at Mercedes between 2014 and 2016 took their toll on the drivers' friendship, and left the two fierce competitors at odds with each other. Vettel hit by 'extreme pressure' in 2017 - Hamilton "They were so bad that they didn't even say hello in the morning," remembers Mercedes team chairman and F1 legend Niki Lauda said. After Rosberg finally defeated Hamilton...
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