Spurs want to keep Kevin Wimmer despite offers from Cologne and several other clubs in the Premier League and the Bundesliga, his agent has said.
Hummels, 28, progressed through Bayern's youth teams but made just a solitary league appearance before opting to join Dortmund in 2009.
Hoeness, 65, was re-elected as Bayern president in November after serving a prison sentence for tax evasion.
Hamburg have signed Greek defender Kyriakos Papadopoulos on a six-month loan from Bayer Leverkusen.
Niklas Sule will move to Bayern Munich this summer, alongside teammate Sebastian Rudy. But will the young defender benefit from the transfer?
Arjen Robben has signed a one-year contract extension with Bayern Munich, committing him to the German champions until June 2018.