depends on a lot of things,
but if u are attacking say 41131 out ur wingers as defence 4 first 15/20
or just in genral go counter n put your wide players lower by one spot.
i always go counter at home yousing 41131 puting team as same but there roles as less buy one
if u use auto as fb go deence ect.
as always put one more in the centre of mid as a holding, evan if u use a cb put him as best he can ,
because two cdm n rb/lb as defence helps alot .
plus alter team style of attack by one lower,
if that doesnt work, use training defence with team work, take a couple of weeks but works.
hope i helped