Second-half goals by Leandro Trossard and Thomas Partey earned Arsenal earn a hard-fought 2-0 win at Aston Villa on Saturday as Mikel Arteta’s side continued their perfect start to the Premier League season. Villa did the double over Arsenal last season, defeats that ultimately cost the Gunners the title, and had plenty of chances to make it three successive wins at Villa Park, striker Ollie Watkins missing two gilt-edged openings.