Xhaka is a leader on the pitch. Maybe he can not be the best player, sometimes he did the stupid things. But to have someone to replace him, i think Tielemans can't be this guyWhen was the last time we got a clean sheet though? I think Xhaka's defensive skills are good but he's not prime Kante or anything like that. I think a clear structure helps more than who is playing in midfield.