While watching the match yesterday I was wondering why is it that Sane does so much better for City (and even for Schalke to be honest) than he has for Germany. In his defense, he has been playing as a RW in some matches, which doesn't suit him at all and is not his best position. But even in the games he has played at LW, he's generally been poor.
I think Sane needs a defensive LB or someone who cuts into the middle to allow him more space to attack the full back. If the LB moves inside then he'l take a defender with him and therefore Sane can be left one on one with the opposition RB. What we saw yesterday, and generally for Germany, is a lack of space for Sane on the left as it can get very congested with the opposition RB, RW and his team's LB all in the same tight space, which forces him to either pass the ball back/sideways.
Maybe Low would have to look to restrict Hector's runs forward if he plans to play Sane at LW. Otherwise with Reus/Draxler cutting in, it would be essential to have an attacking LB.