Kevin Korjus believes that he had the potential for a faster lap time after ending his first Formula 1 test eighth overall, 3.588sec off pacesetter Jean-Eric Vergne. But the 18-year-old Estonian, a race winner in Formula Renault 3.5 this year, was satisfied with his overall performance in Abu Dhabi.
"I'm not so happy about the best lap time I did, but overall it went quite well," he said. "I improved every lap and got more used to everything, so it was good. I'm sure if I were to drive tomorrow I would get a much better lap time."
Korjus added that adapting to the braking capacity of the Renault was the biggest challenge. He did not struggle to deal with the speed of the car, but was impressed with its top speed when using the DRS wing and KERS boost.
"I was surprised by the brakes of this car," he said. "You can really brake late and feel how your body has to stop. I found that quite difficult. The straightline speed is not so big a difference. But when you press the KERS and the DRS you can feel that the car is quick."
Jan Charouz, who tested for HRT today, will take over driving duties for Lotus Renault GP on the final day of the test tomorrow.