The Premier League transfer window closes next Thursday and it is understood that the champions would not try to replace Sane if he's sold before then.
England winger Jadon Sancho starred for Borussia Dortmund on Saturday to help his side beat rivals Bayern Munich 2-0 to win their sixth DFL Super Cup and claim early bragging rights in the curtain raiser for the German Bundesliga.
The Germany global has picked up six major trophies with City, including two league titles, but he found regular playing time hard to come by towards the back end of last season.
"But the player [Sane] didn't tell me anything".
He said: "I answered many times this question, I'm not aware of the rumours". City remain hopeful that Sane, whose contract expires in 2021, will commit his future to the club and he is yet to give any indication he wants to leave the Etihad.
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The 23-year-old has been a target for Bayern all summer, after he struggled to command a regular place in City's team during the second half of the season, with manager Pep Guardiola often confining him to the substitutes bench. "We were quite close and now it's a little bit different but that's the reality, I can't say any more".
"I think he's so good for football".
Having won the PFA Young Player of the Year award in 2017/18, Sane enjoyed a somewhat frustrating year on a personal level last term, starting just 21 league fixtures as City secured back-to-back league titles.
Guardiola confirmed goalkeeper Claudio Bravo, who missed the majority of last season due to an Achilles injury, would play in the season's curtain raiser on Sunday and that all South American players except for Fernandinho were back in training.