Sorry I disagree with a lot of these posts about Semi.
I think he has been one of our best performers and chipped in with goals, as well.
He and Bartley have had no defensive midfield cover so are stretched out of position to deal with danger and then have to rush back into position and marking.
An example of lack of DMs can be seen in the last ditch tackles Bartley had to make late on against Wolves as he flung himself into tackles as the "paper thin" DMs couldn't be bothered to clear the danger as Wolves came down the middle.
Also happened against Man City.....Sawyers not clearing a ball on the edge of the area and they scored. Ball should have gone into Row Z in that dangerous position.