Werder Bremen's sports director Frank Baumann supported head coach Markus Anfang in the discussion about a supposedly fake vaccination certificate.
"Markus has assured us that everything went correctly and that he was also vaccinated," said Baumann on Friday after Bremen's final training session before the top second division match against FC Schalke 04 on Saturday (20.
Bremen - 30 p.m. / Sport1 and Sky).
"And so, from our point of view, there is no reason to doubt it."
The public prosecutor's office in Bremen confirmed on Friday that they had initiated an investigation against the beginning.
The background is a criminal complaint from the Bremen health department towards the beginning.
The 47-year-old is suspected of having used a forged vaccination certificate.
The beginning had rejected the allegations in a club announcement on Thursday evening.
dpa