Hector Bellerin's defensive frailties were "exposed" by Jack Grealish in Arsenal's 3-0 defeat to Aston Villa, according to Kevin Campbell.
The Gunners have been praised for their solid displays this season under manager Mikel Arteta, but they were unravelled by Villa at the Emirates on Sunday.
Bukayo Saka's own goal gave the visitors the advantage in the first half, before Ollie Watkins struck twice in quick succession to inflict a fourth Premier League defeat on Arsenal.
Watkins' second goal came after Grealish burst from his own half into the final third and shrugged off the challenge of right-sided wing-back Bellerin to assist the striker's effort.
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