David Luiz is Arsenal’s best defender
Arsenal suffered their 12th Premier League defeat of the season on Saturday night from reigning champions Liverpool, leading to even more questions about Mikel Arteta's suitability for leadership at the Emirates Stadium.It's a debate that takes its ugly head every time the North London club fails to score three points, and the often over-reactionary response is a result of the lack of perspective being applied; Jurgen Klopp's side finished 43 points ahead of Arsenal last season, so it is difficult to see why the result has…