The home crowd were off their seats within 15 seconds of Kevin Friend blowing his whistle for proceedings to commence, as Naby Keita stole in to dispossess Jon Gorenc Stanković before taking the match by the scruff of the neck via the post.
"It was hard for us after the first minute, but I have to back my players and I have to back Jon Stanković, because for me, he is an outstanding character," said Siewert.
“I have to protect all of my players because it would have been easy to go on the back foot directly, but we because of pressing we had decent opportunities and created possibilities.
"I'm really proud (of the response to going 1-0 down). It would've been easier to sit back and put our helmets on, but they could've also punished us then because they are top of the table, with big quality.
“It made me really proud because there were so many elements which were good, and of course the overall result means it's hard to take, and I feel sorry for the players, but their performances will lead to results.
"I feel sorry for my players because they punished themselves, but this is a thing what has to get out of their minds, and next season will be different."