Leandro Trossard was one of several top performers in Arsenal’s 2-0 away win over Aston Villa. On Saturday evening, Mikel Arteta finally got the better of Unai Emery after falling short to his countryman twice last season. Arsenal left Villa Park with three points, winning 2-0 on the night thanks to goals from Trossard and Thomas Partey. The Belgian, along with David Raya and William Saliba, was a standout performer in Birmingham, where he became a chart-topper at Arsenal in the Premier League. READ MORE: Five key things we spotted as Arsenal overcome their first away test with 2-0 win vs Asto…