The Bosnian frontman offered a timely reminder to manager Roberto Mancini of what he is capable of on Tuesday as he netted the winner in a 1-0 victory over West Bromwich Albion.
Dzeko is City's top marksman in the Premier League this season, but he often finds himself benched for big games.
That could be the case again on Saturday, with the 27-year-old waiting to see who will get the nod for a Wembley showdown with Wigan Athletic.
Asked if he expected to make the cut after helping to down the Baggies, Dzeko told Sky Sports: "I don't know. It's not my decision, it's the decision of the manager.
"I'm happy that I played today again 90 minutes, scored the goal and we will see. I think it is important that we win the cup, that's the only thing."
On a tight contest against West Brom in which City had to settle for one goal despite going close on a number of occasions, Dzeko added: "In the first half, in the last 25 minutes in the first half, we had four or five very good chances and scored only one goal. In the second half it was a very open game as well, they had chances and we had some chances.
"I think it was a very tough game. I can speak for myself and say I was very tired at the end of the game. I can't remember the last time that I played 90 minutes."