Arsenal tumbled out of the Champions League this week as they lost to Bayern Munich and Jamie Carragher has fired a word of warning. The Gunners went to Munich being well in the tie at 2-2 but saw Joshua Kimmich score the only goal of the game in the second leg to put the tie to bed. For Arsenal, it was a bitter blow in what has been a dismal week in an otherwise successful season. The league title now looks harder than ever to win, and their short-comings in European football were painfully exposed by Munich, who showed their experience to see off Mikel Arteta’s side. READ MORE: William Galla…