Augsburg have signed Germany Under 21 international Kevin Vogt in a deal worth €685,500 (£550,000).
South Korea international Ja-Cheol Koo will see out the season with Augsburg after joining the club on loan from Wolfsburg.
Frank Arnesen has hit out at the behaviour of Wolfsburg coach Felix Magath after Ja-Cheol Koo's move to Hamburg fell through.
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