If 3 at the back means we play a defender over Son, or Lamela, then until we have true WingBacks and not just converted FullBacks, I'd avoid that formation pretty much like plague.
For this match I would play a back 5 like...
KWP_Toby_Vert_Rose
_______Foyth_______
or
KWP_Snchz_Vert_Rose
________Toby________
And a front 5 of...
____Eriksen___Dele_____
Lucas_____________Son
_________Kane_________
No Aurier, No Sissoko, No Llorente.
.
For this match I would play a back 5 like...
KWP_Toby_Vert_Rose
_______Foyth_______
or
KWP_Snchz_Vert_Rose
________Toby________
And a front 5 of...
____Eriksen___Dele_____
Lucas_____________Son
_________Kane_________
No Aurier, No Sissoko, No Llorente.
.