Marco Rose: 'We are disappointed and dissatisfied'
Rose's side were well on top in the first 45 minutes, but failed to take advantage of their chances and were eventually beaten by a second-half goal from Nils Petersen, who scored shortly after he was subbed on.
"Congratulations to Freiburg. We had an excellent first half and were really dominant. After the break, it was a more open game. We defended poorly from the set-piece that led to their goal. Particularly after the sending off, it was very difficult for us. We are disappointed and dissatisfied," Rose said at the post-match press conference.
Freiburg coach Christian Streich was overjoyed with the win.
"During the first half, I had the feeling that it would be a difficult evening for us. But we started to improve around 15 minutes before half-time. We couldn't have done more in the second half. Today, we had a bit of luck on our side against a very good team. Now we have 41 points, which means we won't get relegated," he said.
Gladbach, who dropped valuable points in the race for a Champions League spot, sit fourth in the table, level on points with fifth-placed Bayer Leverkusen, who lock horns with Bayern München on Saturday. Freiburg remain eighth.