#2 Defence

Arsenal have conceded a worrying number of goals thus far. With 35 goals conceded, it is the greatest number as compared to the other teams in the top six. Liverpool is the team behind Arsenal, with 31 goals conceded.
Arsene Wenger had been switching between a back three and a back four, in an attempt to find the most suitable line-up for the team. Injuries to senior defenders saw Calum Chambers and Ainsley Maitland-Niles receiving much more game time than they have expected, especially for the latter.
To the disappointment of many Arsenal fans, the team failed to recruit any defenders in the January transfer window.
The most consistent defender has to be Nacho Monreal, but even for him, an error in judgement in the match against Swansea, allowed their opponents to have a scoring opportunity.