 From this project the construction of the section between Fuencarral and Nuevos Ministerios which opened on 9 June 1982 on the occasion of the celebration of the World Cup in Spain began, as the line gave service to Santiago Bernabeu Stadium.Given the economic difficulties of the Metro in the 70s and 80s, the rest of the project from the original Line 8 was discarded, and instead only tunnel that connected via line 8 to line 7 is enabled.This way, on Tuesday 23 December 1986, the extension of line 8 from Nuevos Ministerios and Americas Avenue was opened

The project developed between 1995 and 1998 to merge lines 8 10 by building a tunnel between Alonso Martínez and Nuevos Ministerios, left down the stretch Nuevos Ministerios - Avenida de America.