is one piece episode 173 filler?

Kamakiri and another Shandia warrior are seen getting close to the Shandra Ruins and the Giant Stalk when suddenly, Enel appears. Enel commented on Kamakiri's thoughts about him being there.

Kamakiri responded, attributing it to Enel's Mantra. Enel disproved saying it is written all over Kamakiri's face and normally he would not be there but he is also a participant of the Survival Game.

Enel then challenged Kamakiri telling Kamakiri he would not fight him for five minutes, and Kamakiri is free to do what he pleases to Enel. However, once the five minutes is up, he would fight Kamakiri.