Real Madrid B

Real Madrid Castilla Club de Fútbol or Real Madrid B is a Spanish football team that plays in Primera Federación – Group 1. It is Real Madrid's reserve team. They play their home games at the Alfredo Di Stéfano Stadium with a capacity of 6,000 seats. Reserve teams in Spain play in the same league system as their senior team rather than a separate league. Reserve teams, however, cannot play in the same division as their senior team. Therefore, Real Madrid Castilla are ineligible for promotion ... source: https://en.wikipedia.org/wiki/Real_Madrid_Castilla