Injury-plagued Hamburg winger Romeo Castelen has been ruled out for at least three weeks after suffering a thigh problem.
The 28-year-old Dutchman sustained a partial tear to an adductor muscle during a friendly match on Saturday.
Castelen had only recently returned to Bundesliga action following two years on the sidelines due to consecutive knee injuries.
"You cannot envy Romeo Castelen," Hamburg said in a statement. "The 28-year-old will be out for three to four weeks."
At the same time, Hamburg director of sport Frank Arnesen has told David Jarolim that he can leave the club this winter and still return to work in a coaching capacity when he hangs up his boots.
The Czech Republic midfielder appears to be surplus to requirements at present and, despite having a contract which runs until the end of the season, the 32-year-old will be allowed to leave the club in January.
"David Jarolim is a player who has achieved so much for this club and he has told me that he would like to be a coach of a youth team when he ends his career, but that he would like to play one or two years more first," said Arnesen on his club's official website.
"Therefore, I told him that, if he would like to move, then we would love to have him back after his playing career to coach one of our youth teams.
"First of all, he would have to talk to the coach to see what role he has in the team.
"He is a role model for young players because even when he has not played so much, he has never complained."