is one piece episode 723 filler?

Law stands over a beaten Doflamingo, preparing to finish the Warlord off and avenge Corazon. An angered Trebol attacks him, but is kicked out of the way by Luffy.

Doflamingo remembers how Law came to the Donquixote Pirates resembling himself, but changed after Corazon took him in and betrayed him. Doflamingo tells Law how he really felt about Corazon, who to him was a good-for-nothing traitor.

An angered Law then attacks Doflamingo with Counter Shock, causing the Warlord to cough up blood and convulse before going limp. A fatigued Law then steps back as he collapses from exhaustion.