Williams was left to rue a disappointing start to the German Grand Prix after failing to score at Hockenheim – despite both drivers qualifying inside the top ten.
Rubens Barrichello lined up eighth on the grid with Nico Hulkenberg two places further back in tenth but the pair were slow away at the start from the dirty side of the track.
Barrichello lost out at the hairpin on the opening lap and was unable to make up places as the race wore on, despite lapping at a similar pace to the cars around him, and took the chequered flag in twelfth with Hulkenberg one place behind in 13th having also lost out early on.
“I had a very difficult start to the race, my pull away was not very good,” Barrichello reflected. “I was running in position for the hairpin when Kobayashi's move on the inside left no braking margin, which backed everybody up.
“During both stints on the option and prime tyre, our pace was much the same as the cars in front, but having lost track position, there wasn't enough pace differential to make up position.”
Technical director Sam Michael admitted he wasn't satisfied with a failure to score from the race and said the team was now focused on improving its performance in Hungary this weekend.
“It was not a satisfying outcome to miss out on points today,” he said. “We struggled with poor starts on both cars which dropped us a couple of positions immediately.
“With similar pace to all the cars around us, we then tried two quite different strategies to recover, but nothing went wrong with the other team strategies, so we couldn't make a difference. We'll now look to improvements for next week's race in Budapest.”