Arsenal face Villarreal on Thursday night looking to overturn a first-leg deficit to reach the Europa League final.
The Gunners lost 2-1 in Spain last week and will need to see off former head coach Unai Emery if they are to reach the showpiece event in Gdansk.
Here, the PA news agency takes a look at some of the key talking points heading into the fixture.
PEA ready to roll
Arteta has some selection dilemmas to address ahead of the game, after his surprise move to a false-nine system backfired in the first leg. Having both Aubameyang and Alexandre Lacazette fit means he will not have to try something as unexpected this time out. Kieran Tierney's timely recovery from a knee injury is likely to see him reinstalled at left-back, allowing makeshift defender Granit Xhaka to move back into the midfield and partner Thomas Partey with Dani Ceballos suspended.
