Struggling Bundesliga club Hanover sacked coach Mirko Slomka on Friday in an effort to stave off the threat of relegation.
"This was not an easy decision, but we believe that we had to change something," said Dirk Dufner, the club's sporting director.
Slomka took charge of the club in January 2010 and had a contract until June 2016.
His successor is expected to be named in the "next few days".
Hanover are currently 13th in the Bundesliga, four points off the relegation places.