Young Boys are without no fewer than six players through injury for their welcome of Villarreal. Despite a narrow defeat to Atalanta last time out in the competition, the Swiss side could be unchanged for Wednesday's game. After a number of injury issues earlier in the season, Unai Emery has the luxury of a full squad to select from in Switzerland. Emery could go with a 4-3-3 once more, with Gerard Moreno leading the charge and Arnaut Danjuma and Yeremi Pino flanking the Spaniard. Francis Coquelin missed the loss at Manchester United as he was banned, but returns to the squad here.