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Munich Bayern president Karl-Heinz Rummenigge does not rule out the possibility that Thomas Muller may leave the club next summer.
The 24-year-old forward is not a starting player this season and does not feature prominently in Josep Guardiola's tactical schemes.
The main candidates to acquire T.Muller remain Manchester United, but Real Madrid and Barcelona also promise to fight for the player's signature.
"If a player does not feel good at Bayern, he should come to my office and discuss his future in the team," K-H.Rummenigge told "Bild" newspaper.
T.Muller, valued at 30 million euros, has been playing for the main Bavarian team since 2008.