Emery, whose team are yet to win a league match this season, has also claimed that he was pleased with the "balance" of his side in the draw at the Estadio Ramon.
"We had 3-2 with a legal goal but we were kept level at 2-2 and did not have enough. The opponent's counter-attacks were dangerous and they generated two goals," he told reporters at a press conference.
"Our attack-defence balance should be more level and on Thursday we did not suffer from those. Here, yes we have, but we must continue along this line. We have raised a proposal to create, to go for the win and to search out our opponent.
"From this proposal we have adjusted things and improved. I want a more aggressive and creative team, because nobody says that if we defend more we will win. It is something that is not negotiable and we have discussed it a lot - we want to win, be aggressive and be better prepared for knockbacks."
Sevilla currently sit 15th in the table.