The Rojiblancos are on course to retain the trophy and go into Thursday's first leg at the Ramon Sanchez Pizjuan as favourites to progress.
However, Iborra is well aware that beating Vincenzo Montella's men will not be an easy task.
"We cannot think about the final yet," Iborra told Goal.
"The first leg will be an important and beautiful game to play. We are prepared to face it.
“We know that Fiorentina have great players and that they are having a good season in the Italian league - and we know that they will be difficult.
“All the players know that this is a special game for our fans and we want to give them reasons to feel proud. We are sure they will give us a helping hand as they have done all season."
Sevilla are currently fifth in La Liga, three points behind Valencia who occupy the final Champions League spot.
"We will try to finish fourth," Iborra promised. "We will fight for the Champions League and we will continue to leave everything on the field just like in the match against Real Madrid."
Sevilla lost 3-2 at home against Real last weekend in a game in which Iborra scored.
“I was unlucky earlier in the season in the game at the Santiago Bernabeu but I had better luck in the return match. However, the goal did not help the team. We will fight to the end in La Liga," he concluded.
