Sure, Not like SHs went from doing no harm or getting fodderised to beating Well Trained Cp9 pre ts.
If Zoro n Sanji can go from beating Veterans to King n Queen, Law who's stronger and will also contribute in Kaidou fight, can indeed fight Low Top Tier, if restrictions on his df are removed like Stamina problems, and if he's df is Awakened, you can bet he easily can do so. Don't forget his df is the Ope Ope no mi, one of the most expensive hyped df in Onepiece.