Arsenal have to quickly put Sunday’s Premier League defeat behind them ahead of their biggest game of the season so far. The Gunners lost ground in the title race after falling to a 2-0 defeat to Aston Villa at the Emirates Stadium. Arsenal’s defeat, combined with Liverpool’s equally unexpected loss to Crystal Palace, has put Manchester City in pole position for the title. However, the Gunners must now turn their attention to Wednesday night’s trip to Bayern Munich for their Champions League quarter-final second leg. Arsenal drew the first leg 2-2 at the Emirates Stadium last week, so it’s ver…