To get to the DFB-Pokal semifinals, the underdogs defeated Bayern Munich as well as Borussia Monchengladbach and Eintracht Frankfurt, two other Bundesliga teams.
To advance to the championship game, they take on FC Kaiserslautern on Tuesday.
According to Ziehl, “it’s totally normal to have thoughts about the final because you are close,” World Service Sport reported.
“It’s crazy to forbid dreaming; this is a great moment, and the days before you are maybe dreaming, thinking about a final in Berlin.”
The current Bundesliga leaders Bayer Leverkusen and Fortuna Dusseldorf, who are aiming to win both the league and the cup under Xabi Alonso, will square off against the winners in May at the Olympiastadion.
Ziehl, 46, continued, “It’s something special for a third-league club to be in the final and you can’t say ‘don’t think about it.”