Where they stand: 7th in Liga Unai Emery's amazing semi-final record Possible line-ups Villarreal: Rulli; Foyth, Albiol, Torres, Pedraza; Parejo, Coquelin, Trigueros; Gerard Moreno, Alcácer, Chukwueze Expert predictions Samantha Miller, Arsenal reporter: Arsenal's slow start to the first leg very nearly cost them this semi-final before half-time – they cannot afford to make the same mistake(s) again. The Gunners showed admirable spirit to force their way back into the tie, and Pierre-Emerick Aubameyang might even have levelled late on. Great second leg comebacks Graham Hunter, Villarreal reporter: It's amazing what the desire for a trophy, even a much-longed-for final, can inspire. Villarreal look pretty near their limits, but the Yellow Submarine felt, at the very least, Arsenal's equal for large parts of the first leg. What will decide this perhaps isn't who's the better team – it's who has the energy, commitment and desire.