Hamburg early exit from the Champions League was an embarrassment to German football as well as the club and their fans, according to coach Thomas Doll.
Hamburg saw their slim hopes of progress from Group G evaporate when they lost 3-1 at home to Porto on Wednesday, making it four defeats from four games.
“We represented German football very badly in the Champions League,” Doll said afetrwards.
“We lacked the necessary aggression and the players will have to look at themselves and think about whether they really put everything they had into their performances.”
Hamburg fell two goals behind before rousing themselves from their slumber to make a contest of it.
“It’s simply not good enough to start playing only after you’ve gone one or two goals down,” Doll said.
“I can totally understand why the crowd were whistling the players.”
Doll promised a recovery in the Bundesliga, where the club have begun the season poorly.
“The quality is there and the players have the right character,” he said. “They just have to show it.
“We now have to concentrate on the Bundesliga and I’m convinced we can come back.”