Timo Glock was critical of Sebastien Buemi after the Swiss crashed into the Virgin racer during the Korean Grand Prix.
Glock was enjoying one of his strongest races of the season until Buemi slithered into the Virgin car at the end of the main straight. Glock said Buemi "was all over the place."
"This was a very disappointing race, especially after having been in a strong position to achieve a good result," said Glock. "The restart was OK and the track was starting to improve. We had quite good pace in the first part of the race and were clearly the quickest of the new teams.
"It's just a huge shame that we couldn't finish the race and all because of the mistake made by Buemi. It just seemed that he was all over the place. We now head to Brazil for the penultimate race of the season where I hope we can expect more luck than we found here in Korea."
Team-mate Lucas di Grassi completed a poor day for the Virgin Racing team after crashing out when trying to overtake Sakon Yamamoto's HRT.
"A very frustrating day here in Korea," he said. "We had made the correct call by switching to the Intermediate tyre very early in the race and on lap 15 I went out trying to avoid a crash with Yamamoto, who was ahead of me but much slower.
"Again I was in a good position for a strong result as I was running together with both Saubers and a Toro Rosso after the last safety car period ended. The next stop is my home race in Brazil, so we hope for better things there in two weeks' time."