Real Betis midfielder Isco expects jeers from Sevilla fans on Sunday.
Isco left Sevilla in a bitter split before Christmas last season, having only signed for the club over summer.
After defeating Aris Limassol in the Europa League, Isco said: "It doesn't depend on me, I'm sure there are whistles, or maybe not, but I don't care.
"Now it's time to rest and tomorrow (today) focus one hundred percent on an important match, which means a lot for both teams and for the city, and I hope we win, I hope we play a great match.
"No, you can't jump onto the field thinking you are (favourites), the first thing is to do a good job so that we have more options."