Arsenal will begin their summer preseason with a friendly in Dublin, Ireland against Spanish side Real Betis on August 5. The Aviva Stadium, on the River Liffey, will be rocking for that one. And as we just learned, earlier today, the Gunners will begin the defense of their Premier League title with a visit from a newly promoted side, Coventry City, on Friday, August 21. Until then, it’s the silly season, so let’s talk about the North Londoners …