Kovacic said on Thursday all his team-mates are "ready, focused and in good shape" after winning many games, reports Efe.
The midfielder believes that Atletico is a tough team but Real Madrid is ready for the final.
The Croatian said he is excited because he will play his first Champions League final in Italy at the stadium of his former club Inter Milan, where he played for two and a half seasons.
(Eyes on Champions League crown for Real Madrid, not personal goals: Cristiano Ronaldo)
Kovacic noted that he will also have another exceptional moment on Saturday, as he will play the Champions League final at 22 years old.
The Linz-born footballer, who joined Real Madrid in 2015 for six seasons, refused to comment on Spanish and Italian reports that he will be loaned any one of the top European clubs AC Milan, Sevilla or Tottenham.