Werner and Havertz have started for form a bit of a partnership. I think Tuchel prefers the City way of playing without a recognised number 9, and having a very mobile front five. Hence why he didnt fancy Abraham and doesn't seem to like Lukaku. I dont think Lukaku was a Tuchel signing. The mobile front five does work for Chelsea (last seasons CL and in odd games this season) but we have definately also missed wing backs James and Chilwell who both started off like a train.