Such talks came ahead of Dortmund’s crunch Bundesliga clash with Eintracht Frankfurt on Saturday.
Dortmund lost 2-1 and will now struggle to qualify for the Champions League. However, ex-Liverpool star Hamann has slammed the timing of the transfer talks.
“It’s the most important game of the season and you are not able to address this behaviour because you are afraid to upset the player,” the pundit told
“Dortmund should think about why the players are always walking all over them. They lack leadership there.
“The behaviour of Haaland’s father and Raiola is unspeakable, disrespectful, a cheek. If he wants to go, let him go.