The 22-year-old believes his side's defense can match its rival's attack and is desperate to deliver European glory to the Vicente Calderon.
The Spanish sides meet in Lisbon, with Diego Simeone's side hoping to complete an extraordinary double, having sealed the league title last week with a 1-1 draw at Barcelona.
Koke is hoping that he can lead his side to further glory in the Portuguese capital and is expecting a long and hard battle for the the Champions League crown.
"Our day has come. We have reached a Champions League final after a long fight and are performing very well. It's going to be a complicated game and very tactical as both teams are tactical," he told Marca.
"They are very good in attack and we know how to defend well. It will be a great game and a special final. I hope I'm in the starting XI can defend my shirt, this emblem and give my all in the Champions League final."