After Ryoma is forced to withdraw from the Japan U-17 training camp, Ryoga invites him to play for the US team.

Teams from all over the world competing in the U-17 World Cup gather to start things off with the Pre-World Cup exhibition matches.

Japan's Pre-World Cup match ended. After seeing the match and leaving the venue, Ryoma encounters Sakurano, who is entwined by local bad guys. Doberman attacks Ryoma, who confronts the bad guys while sheltering Sakurano. It was a boy who straddled Hakuba who rejected it. He shoots the ball with a tennis racket while straddling a horse and drives away the bad guys. Ryoma, who was mistaken for a boyfriend by a boy who was fascinated by Sakurano, was challenged to play a game, and they would fight each other in tennis while riding horses.

Finally, the World Cup main draw will begin. Japan's first opponent is the Greek national team. If they manage to beat them, their next round opponent would be the Australia who has managed to beat, Switzerland, who was ranked 2nd in the world.

In the Japan team's first doubles match against Australia, Sanada's tricky shots initially baffle his opponents, but they quickly adapt their defense.

The Japan team plays with renewed vigor following Atobe’s cunning ruse. Finally figuring out Milman’s Tachyon serve, Fuji moves to break the deadlock.

Discouraged by two straight doubles losses, the Japan team heads into the singles matches. Akutsu goes up against the menacing Swiss captain, Amadeus.

After seeing Akutsu's match against Switzerland, Ryoma seems to have developed some feelings of doubt within him...

Ryoma finally returns to the Japan national team. With Ryoma as a member, the opponent in the quarterfinals will be France, ranked 3rd in the world. Shiraishi, who was selected as a member, was worried about whether his "honor student" tennis would be able to compete against the world.

After Yanagi rebukes Mori for his past attitude toward training, the two must overcome their differences if they want to beat their French opponents.

Ryoma's match with Chardard continues in three singles matches of Japan versus France; the victorious team will advance to play Germany.

Ryoma's match with Chardard continues.