Preparation for Sunday's match at home to Bayern Munich will go on without Urs Fischer, who has left the training camp in Barsinghausen for personal reasons.
These reasons are not related to the measures for Sunday's game or coronavirus.
Training and preparation will be undertaken by his two assistant coaches, Sebastian Bönig and Markus Hoffmann.
Meanwhile, the full squad were tested for coronavirus for the fourth time. All tests returned as negative.