Krkic believes the final against Manchester United is their most important game this season.
He told Uefa.com: “The Champions League is the biggest trophy, and everyone wants to win it.”
“To do so at 18 years old would be incredible.”
He continued on United: “They have great players, and have the opportunity to win twice in a row.
“They are a complete team.”
He added: “Barca is not just a club that wins trophies with big players.
“It also has a special structure and philosophy. The cantera was my home, I learnt so much there.
“It is fantastic to play with so many players from the youth team in the first squad.”
