Riku was always a smart boy. Beneath his loud and obnoxious attitude, he was observant of his surroundings—even though more often than not, he chose to ignore them. Still, that didn't diminish his observational skills.
He knew that Haruo kept a close eye on him—not that it was difficult to see—with the opponent's opposite hitter doing the same. That was a reasonable approach. Even though Riku hadn't played well, he was still the team's setter, the one who controlled the game. Moreover, Haruo knew what he was capable of, so keeping an eye on him was definitely necessary.
That was why, against his nature, Riku decided to patiently stay back in the shadows while letting Yuki steal the limelight.
'No, not yet. That blonde bastard still has his eyes on me. I need to be more patient.' He kept murmuring that to himself.