Arsenal manager Arsene Wenger accused his players of a poor attitude and gave no excuses for his side's defeat against relegation-battling QPR, as the Gunners' seven-match winning run came to an end at Loftus Road.
Adel Taarabt opened the scoring for QPR in the 23rd minute and though Theo Walcott managed to level the score before half-time, Samba Diakite's 66th minute strike sealed all three points for the Hoops.
"We made defensive mistakes and our performance was not good enough to win this kind of game," The Sun quoted Wenger, adding, "It was frustrating because they left us the ball and waited for our mistakes - and we made mistakes. Complacency? It is difficult to say but why not?"
Defender Thomas Vermaelen, who scored winners against Newcastle and Everton last month, was responsible for both QPR goals as he was wrong-footed by Taarabt for the opener and beaten again by Jamie Mackie, who set up the second.
"I do not want to single out anybody but we did not need to give the points away today," the manager said.