The mood at Arsenal will be low his morning, after Mikel Arteta’s side fell to their first defeat of the season so far against Bournemouth yesterday. It was a dismal evening from start to finish for Arsenal, as not only did Mikel Arteta’s side lose against Bournemouth in this Premier League clash, but the Gunners will also now be without William Saliba against Liverpool, following his red card for denying a clear goalscoring opportunity. Arsenal’s performance was also littered with individual mistakes. Leandro Trossard’s error played Saliba into trouble, resulting in his dismissal. Later in th…