Have set-piece kings Arsenal really become set-piece strugglers?

Arsenal scored a Premier League-high 25 non-penalty set-piece goals on their way to winning the title last season. But have 'Set-piece FC' lost their not-so-secret edge?

Seven games into the new campaign, the Gunners are one of only four sides, along with Liverpool, Manchester United and Nottingham Forest, yet to score a non-penalty set-piece goal.