Hamburg coach Thorsten Fink has urged his side to bounce back from their 9-2 away defeat to Bayern Munich in the Bundesliga last weekend.
The loss left HSV ninth in the league table with 38 points from 27 matches.
"We've done some straight-talking in training this week," Fink told reporters. "We can't go back to that game. We just have to make sure we've learned from it."
Hamburg will host Freiburg in the Bundesliga on Saturday.