Croatia qualified for the tournament by virtue of finishing second in Group H, three points behind eventual winners Italy.
And Kelava, who plays his club football for Granada in Spain, has backed Ante Cacic's side to go the distance when the tournament gets under way in France.
With Croatia set to face Spain, Turkey and the Czech Republic in Group D, Kelava says he hopes to take on La Roja in the showpiece at Stade de France.
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"I think we can do well," Kelava told Goal in an exclusive interview. "Now we have a great team with [Luka] Modric, [Ivan] Rakitic and [Mateo] Kovacic on midfield.
"We also have a great goalkeeper that plays at Monaco [Subasic] and a very good team. I think we can go very far."
When asked about the prospect of facing Vicente Del Bosque's men, he added: "It's difficult. Spain have won everything and there is always a moment when you have a dip in form.
"Fear? I don't know, Spain can go also very far and I would like a great final between Spain and Croatia."