My concerns about Russell Martin have been superseded by my concerns about James Husband, although I think the true problem may lie not with the assorted individuals right now but with Farke's tactics.... is "zonal marking" actually a thing in this country, and isn't it a bit easy to exploit?
Rafa Benitez employed zonal marking at Liverpool when he was there, but have players like Martin and Husband ever played it before, and surely something which is difficult to get to grips with... would be a bit like asking somebody with an automatic license to drive a manual.
Perhaps I'm old fashioned but if the opposition have a massive unit up front then you stick your biggest defender on him to win the aerial battles, if the opposition have got a quick striker who tries to get behind the back then you play defenders who can play the offside trap, etc etc. Surely with "zonal marking" the opposition can just work out that a midget is in x zone and a slow coach is in y zone, and then tell their speed merchant to hang around near zone y and stick their biggest unit in zone x and tell people to pump balls to him.
Also, I've never seen a zone score a goal*
*Just pinched that.