He brought up City, in his press conference ffs OF COURSE it's relevant to us, he's our player. Utd or Liverpool would not acceptr one of their players being volunteered as a target for journalists.
If there is a big problem caused by Sane in the German team, and the only way to fix it, is for a players rep to go public, then it's just about acceptable, although tbh it still would be better dealt with internally.
There CLEARLY isn't a big problem with Sane, the manager brought him on. If the problem was so big, he'd leave him off the pitch then drop him again.
Kroos comments have made it appear as if there is a problem & people are running with it.