Ryoma! The Prince Of Tennis [Japanese-Language Version]

Provoked by his father well known as Samurai Nanjirou, a legendary winner of a US tennis championship, Ryoma is determined to train himself in US after winning a championship in Japan. He runs into his classmate Sakuno, getting in trouble with street gangs, and accepts a tennis match against the villains to save her. Through the intense tennis battle, the shock of two ramming tennis balls makes stream of time leaped somehow.