Manchester United is at a very tight spot but I'd expect Amorim to know which to give priority. If he can get a defeat against Arsenal and a victory against Real Sociedad, looks to me like a good result. They need the Europa trophy badly because it's their golden ticket to the champions league. So I don't expect him to give much importance to the Arsenal game and to hand Chido Obi and Harry Amass their first premier league start in other to rest other players for the Real Sociedad 2nd leg game.