In 2005 Shanghai invited Manchester United to Shanghai for a friendly  match. In just one day, the sponsor grossed eight million yuan. This time,  Shanghai invited Spain's Real Madrid Club for a friendly match and plus various activities with the fans inside the stadium, the sponsor is ready to make ten million yuan of box office revenue in two days.
The assumption that the level of fans' affection for the two clubs, estimated attendance, ticket prices and so on are very similar is most likely implied by the above inference.