Mikel Arteta has warned Arsenal’s rivals that he plans to build the Premier League champions into the “best club in the world”. Arteta’s side start their bid for a second successive English title against promoted Coventry in the opening game of the top-flight season on Friday. For the first time in 22 years, the Gunners will begin a campaign as the Premier League’s preeminent force, a status Arteta is determined to maintain as he targets an Arse…