IndeedI think the game was a fucking disaster and Conte is responsible for it, but this is correct. From recollection we were four at the back from the moment Richarlison was sent on.
We were from early second half in usual 5-2-3 with Porro Lenglet Romero Davies Emerson
Then he brought Richarlison on and we basically went 4-2-4 with Davies swapping to left back.
Then the clown got sent off and for 7 or 8 minutes we were playing just Porro Lenglet and Davies at the back, with Sanchez on sideline waiting to come on for some 5 mins of that time, when he did come on we reverted back to 4 at the back