Klopp rues missed chances

According to Klopp, his side did not deserve to lose the game 3-2, but he has vowed to bounce back.

"There was no end to the number of chances we had," he said. "Hamburg held on with a combination of luck, Rene Adler and astuteness.

"That's the end of our (unbeaten) streak, and the end of Hamburg's (winless) streak too, but we will carry on.

"It could have ended 5-3 to us. I think we had 26 shots on goal, of which 20 were big chances."

By contrast, there were smiles all around in the Hamburg camp after its first win of the season.

Rafael van der Vaart, making his first home appearance in his second spell at the club, created two of the goals and enjoyed every minute.

"It was a wonderful feeling to be finally back in my stadium," he said. "To then go and beat the defending champions makes it even better.

"We fought passionately for this win. Dortmund had more of the ball and several good chances, but we held our own fantastically and really gave everything to deserve this win in the end."

The result lifted Hamburg out of the bottom three and, according to Van Der Vaart, it could be the spark they need to climb up the table.

"The team, coaches and our fans all worked for this win," he said on his club's website.

"I am proud of everybody. We now have to carry on from here. This can and must only be the first step for us in the right direction."

The next step for Hamburg could follow as soon as Thursday morning (AEST) when its travels to Borussia Monchengladbach while Dortmund is in action again on Wednesday morning (AEST) at Eintracht Frankfurt, which has won all four of its games so far this season.