Mario Mandzukic's third-minute opener was cancelled out by Markus Feulner shortly after the restart, and although Timo Gebhart received a red card for the hosts, the league leaders were unable to find a winner.
"It's not the end of the world. It's just not possible to win every game. We can live with the draw," the coach told reporters.
"After taking an early lead, we failed to make it two or even three. Obviously, we conceded the equaliser at a bad moment psychologically."
"We definitely should have scored a second. That would have calmed things down a lot, but then we went and gifted them a goal."
The goalkeeper added: "It was a tough one for me, because Feulner's shot wobbled and my line of sight was blocked. He hit it very well. We're annoyed about dropping two points here."