A "must-win" in the truest sense, simply because of the opponent. We have historically had a good home record against Sp*rs so hopefully can do them once more. They are clearly struggling in the full-back areas, so (assuming no injuries) I'd expect us to go back to 3 upfront. Key questions are:
1) Does Laca start given we are playing at home?
2) Who should be the MF duo - is Xhaka an automatic starter? Does Ceballos play in MF or as the #10?
3) Who will be preferred between Chambers and Luiz?
I'd go for the below:
Nelson-----Auba-----Pepe
--Xhaka--Ceb--Willock--
AMN---Luiz---Sok---Kola
---------Leno---------