Check out your opponents formation and weaknesses. For example if he's playing with 3 DC's and no DR and DL play with an AMR and an AML and attack down the flanks.
Also if he's got a stronger attack than you have defence play man on man marking.
If his strikers and Attacking midfielders are faster than your defenders don't play offside trap.
I'd also advise that you don't put attacking arrows on your defenders. If anything put defensive arrows on them and play attacking.
I hope some of this helps.