Hamburg's Pierre-Michel Lasogga scored a double in a 3-0 win which condemned Borussia Moenchengladbach to a fourth straight Bundesliga defeat on Friday just days before their Champions League group opener at Sevilla.
The 23-year-old Lasogga opened after 11 minutes and added his second just before the break with Nicolai Mueller getting a third on 52 minutes to give Hamburg their second win of the season to move provisionally up to seventh.
Tailenders 'Gladbach, struggling without injured midfield duo Patrick Herrmann and Granit Xhaka, have gotten off to their worst ever start to the season just three months after their third-place finish.
"I said from the outset that it would be a very difficult season and the injuries haven't helped," said the club's
Swiss coach Lucien Favre, who insisted the Bundesliga campaign was "more important than the Champions League".
The former five-time German champions, beaten at home for the first time by Hamburg since December 2010, have already conceded 11 goals in four games -- one more than in 13 games last season.
Hamburg were gifted the first goal following a sloppy clearance by 'Gladbach defender Martin Stranzl with Lasogga winning a duel with goalkeeper Yann Sommer.
Lasogga doubled his account a minute before the break heading in an Ivo Ilicevic corner.
And seven minutes after the break the visitors sealed victory following a long clearance by goalkeeper Jaroslav Drobny which was picked up by Mueller who lobbed over the outrushing Sommer.
Borussia Dortmund, the league's early pacesetters, travel to Hanover on Saturday as Bayern Munich, second on goal difference, host FC Augsburg.