Caja Mágica
| The Magic Box | |
| Manzanares Park Tennis Center | |
| Main court during 2018 Mutua Madrid Open | |
| Former names | Centro Olímpico de Tenis (planning/construction) | 
|---|---|
| Address | Camino de Perales, 23 28041 Madrid Spain | 
| Location | Parque Lineal del Manzanares, San Fermín | 
| Coordinates | 40°22′08″N 3°41′03″W / 40.368896°N 3.684154°W | 
| Owner | Madrid Espacios y Congresos | 
| Capacity | 12,442 (Estadio Manolo Santana) 2,923 (Estadio Arantxa Sánchez Vicario) 1,772 (Estadio 3) | 
| Construction | |
| Broke ground | 17 April 2006 | 
| Opened | 8 May 2009 | 
| Construction cost | €294 million | 
| Architect | Perrault Architecture | 
| Project manager | LKS Group | 
| Structural engineer | Typsa Group | 
| General contractor | FCC Construcción | 
| Tenants | |
| Mutua Madrid Open (2009—present) Real Madrid Baloncesto (Liga ACB) (2010–2011) | |
| Website | |
| Venue Website | |
Caja Mágica (pronounced [ˈkaxa ˈmaxika]; Spanish for 'Magic Box'), also known as the Manzanares Park Tennis Center, is a multi-purpose stadium located in Madrid, Spain. Since 2009, it has been the home of the Madrid Open tennis tournament.
There are three courts under the one structure, and a series of retractable roofs. The seating capacity of Courts 1 and 2 would have been increased if Madrid's bid for the 2020 Summer Olympics had been successful.