I thought we started with a back four but ended up with a back five. I believe that this contributed to their winning goal. I can't remember names but Chiesa was hovering between our right back (Jelert?) And the defender inside him. Jelert moved upfield to cover the Liverpool left midfielder leaving Chiesa to be handled by his colleague to his left who unfortunately was ball watching at the time.
Chiesa simply ran into open space and as able to set up the winner unopposed.
With a back five nobody knows their responsibilities.