DORTMUND, GERMANY - JANUARY 25: Alexander Isak of Borussia Dortmund runs with the team during a training session at the BVB Training center on January 25, 2017 in Dortmund, Germany. (Photo by TF-Images/Getty Images)
DORTMUND, GERMANY - JANUARY 25: Alexander Isak of Borussia Dortmund runs with the team during a training session at the BVB Training center on January 25, 2017 in Dortmund, Germany. (Photo by TF-Images/Getty Images)