An all-too-familiar weakness cost Arsenal as Blackburn came from behind to win 2-1 at Ewood Park.
Goalkeeper Lucasz Fabianski's vulnerability in the air was exposed on a number of occasions before Rovers captain Chris Samba took advantage to head home a 69th-minute winner.
Robin van Persie's first goal since October 31, having been sidelined for five months with an ankle injury, had put the Gunners ahead early in the first half only for David Dunn to equalise from close range just before the interval.
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