Walk to Tribunal or nearby Line 10 access. Take L10 north to Santiago Bernabéu.
Take L10 south to Tribunal or Plaza de España, then ride or walk depending on energy. Easiest simple move is usually taxi after the stadium.
Take L1: Gran Vía → Sol → Atocha Renfe.
This is the local fallback guide until the official Metro de Madrid map file is reachable.