May 12 (GMM) Nick Heidfeld insists that he is not under pressure from BMW-Sauber to up his game, despite in Turkey once again being outclassed by teammate Robert Kubica.



The 31-year-old German said the fact that his Polish colleague seems to have a slight edge on him at the moment is "annoying", but not particularly a worry.



"He is only four points ahead of me," Heidfeld told the German news agency SID.



"The season is long. I will get him.



"I will work on my driving, and warming up my tyres faster.



"But there has been no criticism by my employer," he clarified.