Mateu Morey will be out of action for an unspecified time period due to muscle complaints. The diagnosis was made after medical tests following the Bundesliga match against Hertha Berlin (2-0), in which the 21-year-old Spaniard was substituted off in the 71st minute. 

After the upcoming league match away to 1. FC Cologne on Saturday, Morey will continue his rehabilitation in Dortmund over the international break. The medical staff will then take it day-by-day as they decide when he can make his return to team training.