Eintracht Frankfurt have signed Filip Kostic on a two-year loan from Hamburg.
The 25-year-old Serbia international joins on an initial loan with an option to buy.
Kostic joined Hamburg for a club-record €14 million fee, scoring nine goals in Hamburg appearances after signing from Stuttgart in 2016.
Hamburg were relegated from the Bundesliga for the first time in their history at the end of the 2017-18 season.
Frankfurt, who won the 2017-18 DFB Pokal, were knocked out in the first round of this season's competition on Saturday.
However, they will enter the Europa League at the group stage, meaning Kostic will play in Europe for the first time since 2014 when he was at Groningen.