Coach Jurgen Klopp has admitted he is wary of Friday's opponents Werder Bremen as Borussia Dortmund aim to maintain their 100 per cent record to stay top of the Bundesliga.
Bremen and Dortmund are two of the five German league teams to have won both of their opening games leaving Borussia top of the table only on goal difference.
Defending champions Bayern Munich, UEFA Champions League side Bayer Leverkusen, who host Borussia Monchengladbach on Saturday, and Mainz 05, who are home to VfL Wolfsburg the same day, are the other three Bundesliga times with 100 per cent records.
Bremen have won both their matches under new coach Robin Dutt with 1-0 victories away against promoted Eintracht Braunschweig and home to Augsburg respectively having flirted with relegation last season.
Bremen last lifted some silverware when they won the German Cup in 2009, but Klopp said there is too much talent in the Bremen team to take them lightly at Dortmund's Westfalenstadion.
"There is a lot of attacking potential slumbering in this Bremen squad, so we have to be very careful," said Klopp with Bremen expected to give Argentinian striker Franco di Santo his debut after signing from Wigan Athletic a week ago.
Champions League finalists Dortmund have had just four days to prepare for Bremen's visit since their 2-1 home win over promoted Braunschweig last Sunday.
Borussia needed 75 minutes before rising star Jonas Hofmann broke the deadlock with a super strike before Germany's Marco Reus netted a penalty to claim the three points.
Klopp expects Bremen to have a similar game plan to Braunschweig to defend hard and hit Dortmund on the break whenever possible.
"Bremen have showed they are very patient, it might be that Bremen will have similar match plan as Braunschweig," said the 46-year-old.
Dortmund's Australian reserve goalkeeper Mitchell Langerak could be set to play with Roman Weidenfeller suffering from gastroenteritis, while Germany midfielder Ilkay Gundogan sits out again with a back injury he aggravated on international duty last week.
Bayern host Bavarian rivals
Defending champions Bayern host Nuremberg on Saturday with Germany midfield star Mario Gotze set to make his league debut since joining from Borussia Dortmund for €37 million (USD $49.5m).
"Obviously it's going to take a little longer before I recover my rhythm and really get back to 100 per cent," said the 21-year-old Gotze who has not played since tearing his hamstring in April's Champions League semi-final at Real Madrid for Dortmund.
France winger Franck Ribery is out with an ankle injury he suffered in last Saturday's 1-0 win at Eintracht Frankfurt.
Javi Martinez, who has yet to lose a league game for Bayern, is in contention for selection again having been left out of the match day squad at Frankfurt after a long flight back from Ecuador after playing for Spain.
Hamburg travel to Hertha Berlin on Saturday looking for an improved performance after they were hammered 5-1 at home to Hoffenheim last Saturday.
Coach Thorsten Fink was so furious with his team that he gave them two days off, but both midfielder Tomas Rincon and defender Dennis Aogo have been thrown out of the squad for using the time to fly to Mallorca.
"The two days off had been meant to think about what they could do better in future, not to go partying. They couldn't have made a worse decision," said Hamburg CEO Carl Jarchow, with the north German team having leaked eight goals in just two games.
German Bundesliga fixtures
Borussia Dortmund v Werder Bremen
Bayern Munich v Nuremberg
Bayer Leverkusen v Borussia Monchengladbach
Hanover 96 v Schalke 04
Hoffenheim v Freiburg
Mainz 05 v VfL Wolfsburg
Hertha Berlin v Hamburg
Eintracht Braunschweig v Eintracht Frankfurt
Augsburg v VfB Stuttgart