is blue lock episode 18 filler?

Isagi and Nagi paint countless possibilities for goals as they understand each other's weapons. Likewise, Kunigami and Mikage make a great effort centering around Chigiri, who has evolved one step further.

In the midst of all, Baro, the king of the field, was left out from the chain of evolution because of his strong ego. When Isagi takes the leading role of the field from him, the sense of defeat makes Baro kneel down to the ground.