Lewis Hamilton said his own "idiot" driving caused his Italian Grand Prix Q2 exit, rather than Adrian Sutil impeding him.
The Mercedes driver was left only 12th on the grid with a poor time in the second qualifying segment.
"It was generally a really poor qualifying session," said Hamilton. "I didn't put one single lap together in Q2.
"I just drove like an idiot. That is the worst I have driven for a long, long time. I am sorry for the team."
The stewards are investigating Force India driver Sutil for blocking Hamilton's final lap at the Parabolica.
But though Hamilton acknowledged that he had been impeding, he did not think it was the primary factor in his disappointing performance.
"It doesn't matter anyway," he said of the Sutil incident. "I should have done it on the lap before anyway."
Hamilton comes into the Italian Grand Prix 58 points behind championship leader Sebastian Vettel.