Paul Scholes says that Arsene Wenger's reluctance to sign a defensive midfielder is harming Arsenal.
The former Manchester United man's comments come after the Gunners' problems in this position were exposed against Borussia Dortmund in the Champions League.
The German giants dismantled Arsenal with a fine display of attacking football, but Scholes feels that a quality midfield enforcer would have been able to stem the tide somewhat.
"The whole world seems to know that Arsene Wenger needs a high-quality holding midfielder but for some reason he chooses to ignore that inadequacy in his squad," Scholes wrote in The Independent.
"Mikel Arteta is a nice footballer and does his best in an unfamiliar role but he is not a defensive midfielder."
There were outcries over the summer for Wenger to solve this problem but, despite lavish spending elsewhere on his squad, he decided against bringing in a defensive midfielder.
The hope was that the attacking talent that he brought in, including Alexis Sanchez and Danny Welbeck, would have been able to compensate for this void, but it appears that it could remain a problem.
Wenger knew the need to sign a defensive midfielder earlier in the window, but after deals for William Carvalho and Sami Khedira didn't materialise, he gave up the search.
It means that the aforementioned Arteta competes with a place in the Gunners' starting line-up with Mathieu Flamini, who looks off the pace at the top level.
Arsenal were expected to mount a serious title challenge this campaign, but their defensive weakness has already been shown up against the very best and there are concerns that another underwhelming season could ensue.