SHANGHAI, China - Red Bull's Sebastian Vettel and HRT's Narain Karthikeyan said they have buried the hatchet after a recent spat over a collision at the Malaysian F1 Grand Prix.The incident cost Vettel, who was fourth at the time, and the frustrated champion labelled Karthikeyan "idiot" and "cucumber." Karthikeyan responded by naming Vettel a cry baby.Vettel said: "We have talked and he has apologised."END TO A SPATKarthikeyan also said they had peace: "For me it was a racing incident and we've spoken to each other so it should be OK."Vettel said that there was no more bad blood between them: "Of course I was upset, I am ambitious. Of course it’s shitty to look into the rear mirror all the time while at the same time trying to drive your own race. But you must still keep track of things."Stay with Wheels24 for the Formula 1 weekend.