The Prince Of Tennis - 1x08 - スプリットステップ- Followmy.tv

In order to counter Inui's data, Ryoma uses a new technique he had practiced when playing against his father, the One-footed Split Step. This requires him to continuously hop in place so he can react faster to the ball, as well as be able to move to another part of the court more quickly. Using this technique, Ryoma gains enough agility and speed to return Inui's calculated shots. This, along with the Twist Serve, surpasses Inui's data and turns the game into Ryoma's favor.