Borja Garcia's second-half strike has helped Real Madrid Castilla string together back-to-back wins in the Segunda Division.
The 23-year-old midfielder found the net with 20 minutes remaining at Nuevo Estadio de la Victoria.
The victory helped the bottom club cut the gap on 16th-placed Barcelona B to seven points.
Manolo will now prepare his side for Wednesday's visit of Girona, who are nine points ahead in 16th.