Veteran striker Claudio Pizarro has signed a new one-year contract with Bundesliga side Werder Bremen.
Chelsea loanee Papy Djilobodji is being investigated by state prosecutors in Germany for making a throat-slitting gesture.
Werder Bremen moved out of the Bundesliga's bottom three after a thumping 6-2 win over Stuttgart on Monday.
Two goals from Pierre-Michel Lasogga gave Hamburg a vital win against relegation rivals Werder Bremen on Friday night.
Bayern Munich are 10 points clear after Robert Lewandowski scored twice in his side's 3-0 win over Schalke on Saturday.
Bayern Munich remain on course for a record-breaking fourth successive Bundesliga title with a 3-1 victory at Stuttgart.