So the big decision for Emery was whether to go with Ramsey or Ozil. There are arguments for both, but can see why he opted for Ozil's greater craft against what will be a massed and difficult to break down defence. A back four also makes sense after the stodgy performance last week, while Monreal starting ahead of Kolasinac at left-back is presumably to provide the defence with a bit more solidity. On the other flank, Ainsley Maitland-Niles' illness means a start for Stephan Lichtsteiner, who Bate will surely target mercilessly. 

If Arsenal do concede tonight they will need to score three to go through.