The middle schoolers are invited to participate in the U-17 Japanese team's training camp. The "losers" who were once dismissed from the camp have overcome their trials and returned, and the camp is lively once again. In room 205, Akaya tells his silent roommates stories about fallen soldiers. In room 201, Fuji and his roommates excitedly discuss the potted plants they brought. In room 211, the Golden Pair starts a pillow fight... Meanwhile, Sanada carries a message from Coach Mifune. The camp's first string of powerful players are returning from their month long tour abroad!

Marui and Kite take on No. 7 Kimijima, "The Negotiator on the Court," and No. 8 Tono, "The Executioner," in the third shuffle match. It's a strange combination, but the defensive power of Kite's Shukuchiho compliments Marui's trick shots, and their form appears ideal. However, Kimijima maintains his composure in the face of the middle school pair's success. Just then, Kite's shot suddenly strikes Marui! Kite's attitude shifts. He's already made a deal with Kimijima...!

The middle schoolers' battle against the first string's No. 11 through 20 continues. Yukimura's opponent is No. 11 Fuwa. However, before the first shot, Fuwa offers Yukimura a handicap and blindfolds himself. Fuwa demonstrates his skills despite his lack of vision, but Yukimura shows no signs of giving up. He even challenges Fuwa, saying he doesn't need a handicap... Meanwhile, Irie plays against No. 20 Akiba. Akiba calls Irie's theatrical style "cheap acting." Thrown into a rage by his words, Irie recalls his conversation with Atobe...

The physical and mental battle of attrition between Marui and Kite versus Tono and Kimijima ends unexpectedly. In contrast with the ruthless match, as No. 5 Oni quietly stands alone on the court, Toyama challenges him to a game. Toyama's skills have improved through training with the losers. To become the best player in Japan, he wants to beat Oni. They more they play, the more his pure fighting spirit fans the flames inside Oni! Meanwhile, on another court Ryoma asks Ryoga how to hit the Byodoin's glowing shot.

Atobe and Niou volunteer to play the first shuffle match against doubles pair No. 9 Oshitari and No. 10 Mori. Niou combats Oshitari's powerful serves shot from the staggering height of 226cm by taking on Tezuka's appearance and using his arm-straining Zero Degree Serve. The middle schoolers take control of the service game. They just need to win one more... Just then, Oshitari's cold gaze pierces Atobe! In the face of Oshitari the Mental Assassin's pressure, Atobe... and Niou...

In the match against the Genius 10's No. 2 Tanegashima and No. 6 Omagari, Sanada chooses Akutsu for his partner. The middle schoolers express concern over Akutsu's break from tennis, but it's Sanada who can't handle Tanegashima's slippery style. Sanada's wildly swinging racket strikes Akutsu on the cheek! Akutsu rises to his feet amidst a tense atmosphere. However, there's no rage in his expression... Akutsu can't afford to lose this match, either. "Play your own style." Receiving Akutsu's words, Sanada regains his focus.

Matches against the first string's No. 11 through 20 begin. Yanagi faces off against No. 17 Mitsuya. To Inui's surprise, he calls Mitsuya "Akuto-niisan." Mitsuya is the man who taught Yanagi Data Tennis when he was younger. Though it's a battle between two powerful Data Tennis players, Inui senses something is off when he sees Mitsuya toying with Yanagi... Meanwhile, Momoshiro and Kenya battling the No. 18 Hira and No. 19 Hara Shitenhoji OB doubles team find themselves struggling against their opponents' unique rhythm.

The middle schoolers defeat their opponents, acquire the No. 11 through 20 pins, and go on to face their next opponents, the first string's No. 1 through 10, also known as the Genius 10! At No. 1 Byodoin Houou's suggestion, they agree to conduct shuffle matches the next morning with their spots on the Japanese team at stake. The night before the battle, as Ryoma and Tokugawa are practicing on the courts, Byodoin hits a powerful shot their way. Tokugawa shields Ryoma with his body, but there's a second shot...! Cutting in front of Ryoma with his racket in hand to return the shot is a mysterious hooded first string player. The name of the man who easily returned Byodoin's fastball is Echizen Ryoga. He claims to be Ryoma's brother, but...

Courts 3 and 5 face off. Oni's court 5 team of middle schoolers is overwhelmed by the surprising strength of the high school students and loses the first round. Doubles team Shiraishi and Akaya are tasked with playing the second round. However, their opponents Matsudaira and Miyako taunt Akaya in an attempt to provoke him.

As pairs are forced to defeat their partners in heartless matches to keep their spots at the training camp, Yukimura and Sanada, top players of Rikkai, face off. Sanada announces his desire for a head-to-head battle and uses his “Fuu Rin Ka Zan” as soon as the match begins.

The losers return, bringing new energy to the training camp, when a new problem arises! Due to a bout of poor weather, shipments of essential supplies have been unable to reach the camp. Unable to eat what they want, the stress builds on the middle schoolers. Their eyes fall upon a large bag brought into the camp by Horio.

Swearing to Shishido that he would become stronger, Otori remained with the winners at the training camp. His turn has finally come in the shuffle matches. Otori enthusiastically faces high schooler Enjoji, but when his Scud Serves prove useless, he loses the match.

The winners remaining at the training camp practice hard and enjoy its luxurious facilities and meals. However, Kikumaru and Otori are disheartened by their separation from their partners. As they commiserate with one another, Atobe and Mizuki harshly state they can't afford to worry about the losers.

Shiraishi and Kenya are the next friends to face off. Though they've long fought together for the same school, they haven't played each other since last summer. Kenya had been avoiding playing Shiraishi because of the events of the previous year's Nationals.