Lazio has a better team than us and only a portion of this fact lies in tactical mistakes.
Lot of it is because of the players we lack, most them could be easily acquired, or at least keep.
However, after Lazio showing us how superior they are, just a couple of weeks ago, even with inferior material at hand, we ought to do better, like Atlanta and other smaller teams do against us.
This is completely on Sarri, he made the same mistakes and learnt nothing from them.