Newly crowned three-time world champion Lewis Hamilton has described his Mercedes teammate as a whinger and insisted that their rivalry wasn't causing any problems to their Formula One team.
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Earlier, Mercedes boss Toto Wolff had admitted that he would have to change their driver line-up if the troubled relationship between the duo starts to affect the team's results.
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Hamilton said that Rosberg complains about a lot of things, pointing that it could be because of their different backgrounds, the Mirror reported.
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The Briton further said that they should not be called as teammates, insisting that one has got be tougher in order to win races and world titles.
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The simmering feud between Mercedes' both drivers took a new turn when Hamilton pushed Rosberg off at the start of the US Grand Prix to lift his third title and the German responded in similar fashion in Brazil.