Borussia Dortmund have secured the signing of Switzerland international goalkeeper Roman Burki from relegated Freiburg.
Hannover earned their place in the Bundesliga next season and sent Freiburg into the second division with a 2-1 win.
Liverpool give U21s more game time than Premier League rivals but top flight lags behind Europe.
A late Nils Petersen goal gave Freiburg a shock 2-1 win over Bayern Munich and kept them above the relegation zone.
Hamburg defended their place above Freiburg in the Bundesliga thanks to a last-gasp Gojko Kacar header.
Paderborn came from behind to move out of the relegation zone and above their hosts Freiburg with a 2-1 win