Sven Mislintat's future at Borussia Dortmund is in doubt, with the squad planner in danger of being fired after just three months.
Mislintat returned to Dortmund in May but according to BILD, his relationship with head coach Nuri Sahin appears to be completely broken.
After Mislintat ran onto the pitch during a training session, Sahin is said to have issued him a warning after being left 'freaked out'.
Although Mislintat reports to sporting director Sebastian Kehl, he has reportedly tried to go it alone with transfers by approaching players himself.
He was reportedly very critical of the signing of Yan Couto, who joined on loan from Manchester City with an option to buy. However, Kehl and sports director Lars Ricken pushed ahead with the transfer.
Mislintat, pictured with sports director Lars Ricken, is unhappy with Dortmund's recruitment
Dortmund have also signed Pascal Gross from Brighton, while Waldemar Anton and Serhou Guirassy joined from Stuttgart.
Mislintat has been accused of leaking internal information, while his appearances on Sky surprised the club.
Last year Mislintat was fired by Ajax, where he was working as director of football.
Mislintat shocked Ajax players by coming into the dressing room to talk about the possible dismissal of head coach Maurice Steijn.
Prior to that Mislintat worked for Arsenal after falling out with Thomas Tuchel at Dortmund over transfers.
During his initial spell at Dortmund, Mislintat signed players such as Robert Lewandowski, Pierre-Emerick Aubameyang, Shinji Kagawa and Ousmane Dembele.