Aston Villa suffered a frustrating 2-0 defeat to Arsenal on Saturday evening at Villa Park. Unai Emery will be kicking himself after Ollie Watkins missed two glorious chances to score before Leandro Trossard’s opener, with Matty Cash suffering an injury. Aston Villa beat West Ham United for their opening match of the new Premier League season, with Cash starting at right-back instead of Kosta Nedeljkovic. This is despite Nedeljkovic being Villa’s best player in pre-season, as Emery opted for experience over the youth of the 18-year-old. But Cash went off injured with a muscle issue at the Lond…