If you're looking for manga similar to Haikyuu!! Riku vs Kuu, you might like these titles.
Harutaka Kato, a 1st year student in Kakegawa high school with the extraordinary ability to jump. After seeing his ability, Maiko the volleyball club manager kept urging him to join the team. Finally, Harutaka was persuaded to enter the club. However, the volleyball club had another star, Yuta Kaneko! Harutaka was upset and tried to show off but all of his smash was blocked by Yuta!! So, what will Harutaka do!?
Focuses on Kimichika Haijima, who got into some serious trouble on his middle school volleyball team, and as a result transferred from Tokyo to Fukui prefecture, where he again met with his childhood friend, Yuni Kuroba. Yuni has overwhelming talent at volleyball but is weak to pressure, but together with Kimichika they become the ace combo of their team. But the two have a fight at the final prefecture tournament in middle school. Now in high school at Seiin High School, Kimichika and Yuni have severed their relationship, but both join the volleyball club. Along with the second-year and third-year students in the club, they work to make Seiin High School's volleyball club a rising star in Fukui prefecture.
The boy’s gymnastics team at Heisei Middle School is an eye sore compared to the nationally renowned girls team. But Fujimake Shun, a first year, has big dreams: to win a gold at the Olympics. Unfortunately for Shun, having no experience in gymnastics and low athletic ability puts him behind even his teammates, let alone the world. But where he lacks in technical skills, he more than makes it up through determination and incredible fighting spirit that doesn’t seem to break no matter how big the obstacle.
Ever since their champion was defeated, the world of girls' junior high ping pong has been in turmoil. Koyori is the new smirking transfer student at her junior high and she's ready to shake up girls' ping pong.