There are a couple of things we need to fix.
The first is Perisic for Sessegnon. The kid is scared and is losing all his challenges - he needs hooking for a new face.
The second is to drop Kulusevski deeper - as a 10. He's isolated out on that right hand side right now, and that front three is disconnected from the rest of the team because Chelsea are stepping up and forming a line between Hojbjerg + Bentancur and them, knowing we can't play it through them.
Finally, we need to win those second balls. That has nothing to do with formation, it has to do with competitiveness, spirit. There are a lot of times we get the ball, someone tackles our lads, it goes into the air, and a Chelsea player wins it. That isn't tactics, it's desire, commitment. That needs to change.
So, nothing radical for now, but please - adjust the formation, hook Sess, and if the game is still like this come 60 minutes...hook Kane, bring Richarlison on.