Dortmund - 36 hours ahead of a Matchday 5 encounter with Hamburger SV, there remains a concern regarding the fitness of key midfielder Jakub Blaszczykowski.

"He's getting better, but still isn't great," said coach Jürgen Klopp on Thursday, and added that the Pole's participation in the fixture "will be a close-run thing". The Poland captain sprained ligaments in his knee during his country's 5-1 victory over San Marino.

Lewandowski improving

His fellow Pole, Robert Lewandowski, who missed the victory over San Marino with tendonitis in his knee, should be fit to feature, "he will participate in training as normal on Friday" said Klopp. Midfielder Nuri Sahin was given the all-clear "after a clash" in Turkey's 5-0 win against Andorra.

Meanwhile, Marco Reus has overcome the gastro-intestinal infection which ruled him out of Germany's win in the Faroe Islands, and has been training with the side since Wednesday. He is expected to feature on Saturday.