Manuel Neuer would not be drawn on a potential reunion with Pep Guardiola at Bayern Munich, saying only that "things are going very well" under Hansi Flick.
Bayern are without a permanent head coach following Niko Kovac's sacking, with former assistant Flick in caretaker charge for impressive wins over Olympiacos and Borussia Dortmund.
Manchester City manager Guardiola, Bayern coach from 2013 to 2016, could potentially make an incredible return, according to Sport Bild.
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Thomas Tuchel, at Paris Saint-Germain, and Erik ten Hag, at Ajax, have each reiterated their commitment to their current clubs, while the report claims Guardiola "does not seem happy" at City, where he has won back-to-back Premier League titles.