Safe is death against this PSG team. Only way to beat them is to go at them incessantly
Yes Schlotterbeck only really needs to clean up the 1% of his game, when he can be pretty disastrous. When he makes mistakes, they tend to end up as a goal against. As said he's Dortmund's Upamecano. He's still pretty young though so I don't know why he wouldn't cut those mistakes out of his game.