World champion Sebastian Vettel has said that he has no regrets about criticising HRT driver Narain Karthikeyan.
The two collided during the Malaysian Grand Prix when Vettel tried lapping Karthikeyan, which prompted the Red Bull driver to call the Indian an "idiot".
Despite Karthikeyan's truce offering, the German insists that his actions were "part of the sport".
"I lost a solid fourth place, so that's disappointing," said Vettel.
"Sometimes you let the emotion show and I don't think someone should be ashamed about that."
After two races, Vettel lies sixth in the championship standings, 17 points behind surprise leader Ferrari's Fernando Alonso.
