Arsenal have one of the best squads in world football. Almost every position on the pitch is occupied by a player who is bordering on world-class, and that’s why they’re top of the league right now. However, as the Gunners showed last season, this position at this point of the season doesn’t guarantee success come the end of the year, and, as we all saw, it only took one injury last term to bring everything crashing down. Last term, William Saliba picked up an injury at the business-end of the campaign, and speaking on TalkSPORT, Danny Murphy has stated that he thinks Arsenal are still a bit t…