Athletic are also chasing a top four finish.
But Simon said: "In Athletic it is impossible for someone to tell you that they prefer the Champions League to winning the Cup. The Cup is the title that moves all of Bilbao, all of our people, and it is what makes us full of hope and live these beautiful moments.
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"I'm always going to keep the Cup, but so far we have to fight for both. We have a very nice opportunity to have a very nice season."
On next week's final against Sevilla, he added: "It is difficult to give them (young teammates) normality, the advice I would give them is to give them normality, not to do anything that they do not do in other games, to approach the game in the same way,"