Serge Gnabry is to be unveiled as a Werder Bremen player on Wednesday after completing his move from Arsenal, the Bundesliga club have announced.
Gnabry, who impressed for his country as they won Olympic silver at this summer's Games in Rio de Janeiro, is expected to join Bremen on a four-year contract for an initial fee of €5 million, according to Bild.
Bremen, who finished 13th in the Bundesliga last season, said in a press release that they will be holding a news conference with Gnabry and sporting director Frank Baumann at 3:30 pm local time.
Gnabry's Arsenal contract is due to expire at the end of the season and Arsene Wenger had said he wanted to prolong the deal.
The 21-year-old, who joined Arsenal from Stuttgart five years ago, is highly rated but has struggled to make an impact at club level so far.
Gnabry made nine league appearances as an 18-year-old in the 2013-14 season, when the Gunners struggled with injuries, but then missed the following campaign with his own fitness problems.
He was sent on loan to West Bromwich Albion last season, but was only given one league appearance by Tony Pulis before returning to Arsenal in January, spending the rest of the campaign playing for their under-21s.
Several German clubs, including Hertha Berlin and Schalke, had expressed an interest in signing Gnabry on loan this season.
Schalke sporting executive Christian Heidel said last week: "All Bundesliga clubs except Bayern are looking at him."
ESPN FC's Germany correspondent, Stephan Uersfeld, contributed to this report.