 The 2008–09 Copa del Rey final was held at a football stadium which as a seating capacity of what?
2008–09 Copa del Rey: The 2008–09 Copa del Rey was the 107th staging of the Copa del Rey. Mestalla Stadium: Mestalla Stadium (Spanish: "Estadio de Mestalla" ] , ] ) is a football stadium in Valencia, Spain. Mestalla Stadium:  The stadium is the home ground of Valencia Club de Fútbol and has a capacity of 49,500 seats.
i don't know