Hoffenheim have signed forward Adam Szalai from Bundesliga rivals Schalke for an undisclosed fee.
Bundesliga champions Bayern Munich will launch the defence of their title against Wolfsburg in the 2014/15 season.
South Korean left-back Kim Jin-su has celebrated his birthday by joining Hoffenheim.
Hannover have signed Spanish forward Joselu from Bundesliga rivals Hoffenheim for an undisclosed fee.
Borussia Dortmund general manager Michael Zorc has admitted Julian Schieber could be set for an exit this summer.
Hoffenheim have completed the signing of Ermin Bicakcic from relegated Eintracht Braunschweig.
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