Arsenal boss Mikel Arteta has admitted that individual mistakes cost his side dearly in their 3-2 defeat to Manchester United.
A misplaced pass from Martín Zubimendi led to United's first goal, sparking a lapse in defensive discipline.
The defeat, coupled with wins for Manchester City and Aston Villa, has cut Arsenal's lead at the top to just four points.
"The first error leads to the second," Arteta lamented, as the Gunners face their first major wobble of the campaign.
