Sevilla fullback Mariano says they must not underestimate Champions League opponents Leicester City.
While Sevilla enter the game tonight in excellent form, English champions Leicester are in freefall.
But Mariano says: "The English team is not doing very well in the league but the Champions League is different.
"It will not be easy for us, we must use the most of the home factor to be able to face the second leg away with greater security. "