Ekstra Bladet reports that the German club watched Kvist in action for FC Copenhagen against rivals Brondby on Sunday.
The 26-year-old has hinted that he may leave the Danish side at the end of the season.
Kvist told Ekstra Bladet: “In consultation with my mental coach, Christian Engel, I will evaluate my situation this summer. I will set myself new goals. As a footballer I have to think about myself.”
