Why is Law not forcing luffy to fall back?

[Blackangel]

he could have used room and shambles to make luffy leave
so, why isn't he doing that?

 

[Kaname]

He did man.
He even tried to use his power but he is ultimately powerless.

 

[Blackangel]

yeah i saw that later.
and i am all caught up to the latest episodes now.