Sebastian Vettel was none too pleased with Narain Karthikeyan in Malayasia on Sunday after the HRT driver cost him a possible P4 finish.
The World Champion had a difficult afternoon at the Sepang circuit, but he still managed to put himself on course for a points haul of 12.
Well, that was until he crossed paths with backmarker Karthikeyan on lap 47. The two made contact and Vettel was forced to pit with a puncture. He dropped out of the top 10 positions and eventually finished the race in 11th place.
Needless to say, the German wasn't very happy with Karthikeyan after the race.
"We did our maximum to get up to fourth, but to then lose the race how I did is very frustrating," he said.
"Some people (Karthikeyan) need to look more where they are going.
"There were then problems with the car after the incident, but I wanted to see the chequered flag, even though there were no points for me.
"Before the incident with HRT the way the race unfolded was good for us, so it's frustrating to lose it like that."
Vettel also had some problems with his in-car radio throughout the race.
"Crucially we lost radio communication and that makes it very difficult in these conditions to know what's going on," said Red Bull driver.
"Today it was crucial to come in at the right time. Having no radio meant we were delayed getting the messages, and I didn't hear anything from the team at the end."