Hamburg have reached an agreement for the transfer of striker Sven Schipplock from Hoffenheim.
Bayer Leverkusen have completed the signing of Germany U19 defender Jonathan Tah from Bundesliga rivals Hamburg.
Premier League new-boys Watford are expected to complete a deal for Hamburg midfielder Valon Behrami.
Hamburg have triggered their option to sign Lewis Holtby from Tottenham on a permanent basis.
Hamburg narrowly avoided a first-ever relegation after a dramatic late fightback saw them overcome Karlsruhe.
Hamburg's Bundesliga future hangs in the balance after they drew 1-1 in their play-off first-leg.