Former Dortmund manager reveals how Pierre-Emerick Aubameyang forced Arsenal move

The striker joined Arsenal in January, however forced himself out of Borussia Dortmund. 

Stoger said Dortmund wanted to keep Aubameyang, but his refusal to train properly forced them to cash-in, with the Gunners paying £56million.

"He left me no other choice," Stoger told 'Sport Bild'.

"He trained well four days of the week. But to underline his wish for a transfer, he skipped team meetings before games or refused to run during the final training.

"We did our best to keep him for at least another half a year, but Auba wasn't ready for that", he added. 

Aubameyang had been at the club for four-and-a-half-years. 

He is currently enjoying life at Arsenal, as he officially has the best minute per goal ratio in Premier League history of those who have scored 10+ (103mins).