Real Madrid Castilla have gone top of the Segunda B table.
Castilla produced a show of authority against Real Union, winning 1-0 thanks to a goal from fullback Alvaro Tejero.
Beating a direct rival in the fight for promotion and recorded their fifth consecutive victory, showing themselves as the form team in the league.
The win also saw them move to the top of the table in group 2 of Segunda B ahead of Sunday's game between Barakaldo and Guadalajara.