1-2: The under-19s beat Atlético to book their place in the semi-finals of the Champions Cup
Rueda and David, with a stunning goal, secured the victory for the madridistas, who will take on Deportivo for a place in the final.
It was held prior to the Atletico-Real Madrid under-19s Champions Cup match.
Roberto Rodríguez's side mathematically sealed the title with four games to go.
"We couldn't possibly be in any better form as we head into the play-offs", commented the frontman, who has notched 12 goals for the club's second string.
They beat Talavera de la Reina thanks to goals for Hugo Duro (2), Hugo Vallejo and Kenneth.