Arsenal are set to face Aston Villa at the Emirates on Sunday as they aim to keep their place at the top of the Premier League, but it will not be easy. Mikel Arteta’s side will head into the fixture just days after being frustrated in a 2-2 draw with Bayern Munich, and will have one eye on the second leg of their Champions League quarter-final tie next week. They will be facing an Aston Villa side chasing a top-four spot under Unai Emery, and this is the first time the Spaniard will be at the Emirates in front of a full crowd since he was dismissed from his role in November 2019, prior to Art…