article_snippet: Germany international Hummels is in the frame to leave for Manchester United, Ilkay Gundogan has yet to sign a contract extension and can leave in 2016 and even the much-vaunted re-signing of Marco Reus might have simply been a stalling tactic to wait for a move to Barcelona next summer.
article_snippet: Germany international Hummels has been strongly linked with a summer move to Manchester United .
article_snippet: Ilkay Gundogan (right) has yet to commit to a new Dortmund contract and could leave in the summer .
highlights_snippet: Key men like Mats Hummels, Ilkay Gundogan and Marco Reus could leave .
  
highlights_snippet: Germany international Hummels will cost Manchester United £35m .
  