Kazuma Ono (小野 カズマ) is one of the tennis players in Chiba and has been part of All-Japan Junior Tennis Tournament Best 32.
Spiky reddish-brown hair
He's a skilled defensive player. He's the type that favors risky flat shots, makes very few mistakes, and corners you with ground strokes.
Though he has a slow reaction time, he makes up for it with his fast legs and hits back harder than you'd expect.