We need to consider Chelsea's weaknesses. Alonso, is bit like Ziege, good going forward with technique but poor going backwards. A bit of pace against him would be worth considering, Son, although he is usually better from LM, Sissoko or GKN, is worth thinking about.
Moses has received much credit but how good is he if he has to help Azpi, Ramirez for 'Boro caused him some problems, especially running at him.
What we do not want to be is ultra passive, i.e. 3 DMs, we know we can detail Alli or Eriksen to work them. However, Alli, needs to be 100% fit. Eriksen has lost form so there is the option of trying Sissoko in what might be his best postion for us which run at their CBs from a central position as he has the ability to do.
I would play 4-2-3-1. I would give the 3 whoever they be freedom to move and rotate. we do have to increase our pace and power, especially without Lamela our press is not effective.
Dembele I would instruct to help the LB. I like Verts there he has ability as he showed when he first joined us and that goal at old Trafford. It does mean we have to persist with Dier and Wimmer as CBs, but they are likely to still be better than CCV or Wimmer at LB.
Wanyama has to run with Hazard, who is operating more centrally in this system. He cant make those silly clumsy challenges leading to yellow as Hazard will dive at every opportunity. This is where Mourinho and Fergie would be making pre-match comments about refs being watchful of Hazard and Costa being a bit easy going down. Of course, Poch the gentleman will not do this but we need to be smart on the pitch.