Arsene Wenger has publicly criticised his defence for a lack of leadership and communication after seeing Arsenal concede a costly late goal against Wigan Athletic on Wednesday evening.
The Gunners have looked repeatedly vulnerable from set pieces this season and saw Sebastien Squillaci head into his own goal after 81 minutes of a 2-2 draw at Wigan when the visiting side failed to deal with a corner.
The draw at the DW Stadium undid the good work of Monday's 3-1 defeat of Chelsea and Wenger was in no mood to gloss over his players' shortcomings in his post mortem.
"It is [a concern] because nobody looks from the outside to take charge on the organisation side," Wenger told Sky Sports.
"There is no voice when the focus drops a little bit. You don't feel that anybody takes charge on alertness and we need to communicate much better than that. The way we conceded this corner is of course very disappointing but you have to give credit to Wigan."
When asked if Arsenal could be pushed into action in the January transfer window, though, Wenger replied: "No, we focus on the players we have and I think we have enough quality. The players are conscious of that and will rectify that."
It was a carbon copy of an incident against Tottenham that saw Cesc Fabregas concede a spot-kick earlier in the season.
Wenger told Arsenal TV: "I think their penalty was definitely not a penalty and we had a 100% penalty - I cannot see a difference with the penalty we got against Tottenham and the one we didn't get against Wigan. What's even more disappointing is the referee was only five yards away.''
Fabregas took to his Twitter account following the 2-2 draw to vent his frustration.
Fabregas wrote: "What's the difference between this handball and my one versus Spurs? Referees don't want us to complain about them but they make life difficult for themselves. I'm not complaining at all, I'm just saying why on the same thing some refs say it's a penalty and some not. Is it a rule or just what they feel?"