London: 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.
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.
Hamilton said that Rosberg complains about a lot of things, pointing that it could be because of their different backgrounds, the Mirror reported.
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.
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.