Mikel Arteta's side took the unusual step of playing with a 4-3-3 formation at Spurs on Thursday night but all of their plans were ripped up when Rob Holding was sent off.
The Gunners usually go with a 4-2-3-1 system - which they've used 25 times this season - but Eddie Howe is likely to go with the 4-3-3 formation that has served him well throughout the campaign. Compared to Man City and Liverpool this game is certainly a little bit less daunting for Howe and co.
Although, given the pain of that North London defeat for Arsenal and the must win nature of this fixture, they probably could not be lining up to face Arteta's side at a worse time.
