Mariano Ferreira, the Sevilla full back, spoke in the mixed zone after the 3-1 defeat the at the Vicente Calderón.
Goals from Diego Godin, Antoine Griezmann and Koke rendered Joaquín Correa's late strike consolatory, as Sevilla slipped to a first La Liga defeat in eight games.
Mariano said: "Elimination from the Champions League has weighed on us, but now that has gone and we have to continue to stay up there at the top. We wanted to win the game today but we have to keep fighting:"
The Brazilian backed his side to return to form in La Liga. "We are having a good seasons," he added, "and we have to keep working hard to achieve. We cannot relax, we can give a bit more."