Arsenal are now back in the mix for the Premier League title, having beaten Liverpool in a crucial six-pointer on Sunday, but there are still issues which need ironing out. Mikel Arteta’s side have had a somewhat perplexing campaign. Some may argue that they have not been at their best compared to last season’s performance levels, but underlying stats would suggest that they are now better defensively and have more control of games. Nevertheless, there have been several somewhat minor problems highlighted over the course of the season which Arteta will need to fix if his side is to lift major …