pretty much.

that is why he had that excellent season under conte in the 3-4-3. That is the best formation for him.

Kante in front dealing with 1 v 1 situations. So by kante slowing down the attack, and if a player were to get past Kante, all Luiz had to do was step in and tackle, or block, or intercept.

And what that allowed was Luiz to play his offensive passing game, by sending accurate long balls over the top to Costa, or to go forward to help set up the offense.

But with no midfield protection whatsoever, which is the case for arsenal, where luiz has to go forward to stop the defender as well as track back or stand 1 v 1? Nightmare city.