However, Spanish football teams were not allowed to do so, as the Royal Spanish Football Federation stated that clubs should use number 1 to 25 for their regular squad, with no additional room for manoeuvre; as a result, David Prieto wore the shirt in 2007–08 in honour of his friend but it was later decided that only youth products could wear that jersey.
Spanish football clubs were restricted from using numbers 1 through 25 for their regular squads, as per the Royal Spanish Football Federation; David Prieto wore the number in 2007–08 to honor a friend but it was later changed to only allow youth players to wear that jersey.