Jurgen Klinsmann is back in coaching for the first time since he was fired by the United States in 2016.
Klinsmann took charge of Hertha Berlin on Wednesday after Ante Covic parted company with the team, which is 15th in the Bundesliga.
Klinsmann is taking over until the end of the season, Hertha said, providing no detail of any long-term strategy.
Covic had been with Hertha continuously since 2003, first as a player and then in a series of coaching roles. He took over as head coach in May when Pal Dardai left but recent performances have been disappointing.
''Since Hertha BSC is not just an employer to me, this decision is a painful one,'' Covic said. ''But I have always said that this club means more than individuals, because I don't just love this job, I love this club even more.''
Hertha has lost its last four games, including a 1-0 defeat to Union Berlin in the derby and a 4-0 loss to fellow struggler Augsburg on Sunday.
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