|Capacity:||Estadio Manolo Santana: 12,442; Court 1: 3,500; Court 2: 2,500; Court 3-9: 250|
La Caja Magica (The Magic Box) is also known as the Manzanares Park Tennis Center. It is located in San Fermin, in the district of Usera. The stadium is a part of the Park Manzanares and hosts the Madrid Masters Tournament every year. There are three courts and a series of retractable roofs. The main stadium has a capacity of 12,442. Designed by French architect Dominique Perrault, the main materials used for construction are steel, aluminium, concrete and glass. The arena is structured around two buildings – Magic Box and Indoor Tennis.