Sane, who is valued at €100m by Manchester City, has been on Bayern Munich’s radar since last summer but a serious knee injury suffered at the start of the season scuppered any plans of a potential transfer.
Bayern Munich look set to revive their interest in the German international when the 2019/2020 season concludes.
Hargreaves represented both City and Bayern during his career, but the former England international believes the chance to learn from Guardiola should be enough motivation for Sane to remain in England.
“Bayern Munich is such a big draw for any German player, so if Sane wants to go back home and has the opportunity to play for the biggest team in Germany then I can understand that,” Hargreaves told the Express.
“But, let's be honest, football-wise it doesn't get better than Manchester City. To leave City and the football they play under Pep Guardiola is a tough decision. Maybe it will be a lifestyle choice. Does Leroy want to live closer to home?
“I think Sane wants to be the best he can be – and if you have the best manager in the game, then...
“I remember interviewing Leroy and he said that the attention to detail Pep gives you is something else. Just look at Raheem Sterling. All players have talent, but Pep maximises it. Once you've had a manager who gives you that, it's hard to go backwards.”
Sane joined Manchester City from Schalke 04 in the summer of 2016 and has since won two Premier League titles with Pep Guardiola’s men.