Nottingham Forest say Steve Cooper remains manager and that they “wish to end the speculation and the false and disruptive reporting” about his job.
In a statement, owner Evangelos Marinakis said the club must come together to secure their survival.
He said “results and performances must improve immediately”.
Forest are without a win in eight games, the longest winless run in the top flight.
Cooper joined Forest in September 2021 and guided them back to the Premier League for the first time since 1999 in his first season.
He has signed 29 players since last summer, spending more than £160m.
Marinakis said: “No-one denies that our club is in a difficult position in the Premier League.
“But we wish to end the speculation and the false and disruptive reporting in the media to confirm that Steve Cooper remains our manager at Nottingham Forest.
“We have all been disappointed with recent performances and it is very clear that a lot of hard work needs to be done to address this urgently.”
More to follow.