And they could turn to Bayern for that replacement, as Kingsley Coman is reportedly on their radar.
SkyGermany suggests that a cash plus player swap deal could be on the cards for Sane and Coman.
Bayern want to sign Sane, and he wants to go back to Germany.
Coman would be the ideal replacement for City, as he plays in the same position and is still young at 23.
Sane has less than 18 months left on his contract, which means this summer is the moment for City to sell if he does not renew.