Egome swung down from the top right side with intense vigor, and
Kirito ran up to him to take this blow. *KLANG!* There was a
mysterious metallic sound that never happened in the tournament up till
now, and the yellow sparks that exploded lit their faces.

These swords that should be causing a knockback continued to remain
clashed with each other, trembling slightly. Kirito countered with
amazing speed, completely ignoring the fact that he was slower as he
moved the sword up, pressuring the opponent. The two swords let out a
grinding sound that echoed throughout the silent west block arena.

(Alicization Running, 195)