The Romanian accepts he will always be in Joe Hart's shadow while he remains at City.
He said: "You get one chance. When the manager says he needs you, and a good club like Manchester City wants you, you have to take the chance.
"You work hard to try to play more, but I knew Joe is a very good keeper, the England number one. I took the risk because it was an opportunity to be at a top club.
"For a keeper it is difficult. Other players get to play for a few minutes, or in other positions, but it is not like that for a keeper.
"I didn't doubt I would play in the final because I feel I have done OK in these games. Now it's my chance to do it in the final."