They had won the first leg 5-3, and cruised to a comfortable 3-0 last night over the big spending side from the south of Spain.
Elsewhere, Barcelona edged through to the quarters with a 1-1 draw at San Mames against Athletic Bilbao after a 0-0 draw in the first leg.
In the night’s other game, a hat trick from Adrian helped Deportivo La Coruna to edge past Cordoba 4-2 on aggregate with a 3-1 win after extra time.