Nico Williams was not included in Ernesto Valverde’s squad on Wednesday. The 22-year-old also missed Sunday’s LaLiga game against Real Sociedad, while his older brother Inaki was taken off in the 62nd minute of the 0-0 draw.
Oihan Sancet, Athletic's top scorer this season with 17 goals, was also omitted from the squad for the game at Old Trafford with Bilbao trailing United 3-0 after the first leg.