The German midfielder moved to Chelsea last summer from Werder Bremen but has struggled for playing time.
With Andre Schurrle joining Chelsea from Bayer Leverkusen, Marin was likely to get even less playing time this coming season.
The German midfielder moved to Chelsea last summer from Werder Bremen but has struggled for playing time.
With Andre Schurrle joining Chelsea from Bayer Leverkusen, Marin was likely to get even less playing time this coming season.
