Emery guided Villarreal on a 19-match undefeated streak after joining the club – a record for the La Liga side – and has them two legs away from a Europa League final against either Manchester United or Roma.
Arsenal will look to reach the showpiece game instead, for the first time since their 2018 defeat by Chelsea, amid speculation over a potential takeover bid from Spotify CEO Daniel Ek and former Gunners Thierry Henry, Patrick Vieira and Dennis Bergkamp.
Here’s everything you need to know about the match:
When is it?
The game will kick off at 8pm BST.
How can I watch it?
The match will air live on BT Sport 3. Subscribers can also stream the action live on the broadcaster’s website and app.
Villarreal: Rulli, Pedraza, Pau, Albiol, Foyth, Parejo, Capoue, Trigueros, Alcacer, Chukwueze, Moreno
Arsenal: Leno, Chambers, Holding, Mari, Xhaka, Partey, Ceballos, Saka, Odegaard, Smith Rowe, Pepe
A cagey first leg, with Arsenal taking the lead but letting the hosts back into the tie late on. Villarreal 1-1 Arsenal.