Don't undersell how bad this midfield is.
Schneiderlin is a decent but safe passer who doesn't show for the ball enough and no longer offers anything defensively.
Sigurdsson runs a lot and is dangerous on the off chance that the ball falls to him in a great position but he is seriously uninvolved. Tosun does more in the build-up phase than he does.
Gana is good at pressuring the ball wherever he is but do we really want him receiving the ball in attacking situations?
Schneiderlin definitely needs to be dropped, Gana needs to sit deeper, and I'd seriously consider Sigurdsson's role in the team.