Union Berlin and coach Nenad Bjelica are to part ways in summer, according to the Kicker sports magazine.
The Croatian, who reportedly has a contract until 2025, took over from club icon Urs Fischer in November and led Union out of the bottom of the Bundesliga table.
However, with three games left this season and after just one win from the last nine games, the Berlin club is once again under serious threat of relegation.
Union didn't want to comment on the report when asked by dpa on Wednesday.
Bjelica's agent Alen Augustincic, meanwhile, told broadcasters Sky the they were surprised that such information was made public.
"We weren't informed so far that Nenad might have to leave Union Berlin early or at the end of the season. Union Berlin haven't yet spoken to us about this," Augustincic said.
According to Kicker, Union were even considering parting ways with Bjelica ahead of Sunday's clash with direct relegation rivals VfL Bochum. However, the club still wants to tackle the fight for relegation together.
Union are currently in 14th, two points above the relegation places.