go out of bounds rather than toward him, with this being dubbed the Tezuka Phantom. However, in order to do this, Tezuka must create an even greater spin on the ball, which can result in Tezuka re-injuring his arm or being permanently sidelined if he uses it consecutively. Tezuka has also opened all three doors of , which is a technique in the series that can only be achieved when a tennis player reached and surpasses his limits. Tezuka's Tezuka Zone allows him to focus the effects of one of Muga's doors, , into his left arm, preventing the loss of stamina, and giving him the ability to return balls with twice the strength, or spin, that they were hit with. The is another one of Muga's doors, and it focuses the power of one's mind, giving him a form of foresight during the game. He shows that he has opened the final door, Teni Muho No Kiwami, during a match in the Japanese U-17 camp. Plot overview As the captain of Seishun Academy's tennis club, Tezuka is the one to give Ryoma a chance to become a regular on the team. Despite being known as Seigaku's "strongest man", he initially remains on the sidelines during tournaments as another teammate sometimes plays his position or their opponent is defeated too early. Though he secretly challenges and defeats Ryoma in an unofficial match, his true skills are first shown during a match against Sadaharu Inui. During the Kanto tournament first-round match against Hyotei's captain, Keigo Atobe, the pain from an old arm injury returns, and though he refuses to give up, the game ends with Atobe's win. In order to receive medical treatment for his injuries, Tezuka goes to Kyūshū (he goes to Germany in the anime). He returns right before the National Tournament, where he unseals a technique that he used to use before his injury to defeat Higa Junior High's captain, Eishiro Kite, in the first match, and then goes on to defeat Hyotei Academy's Munehiro Kabaji in his next match. In the semi-finals, Tezuka plays one-on-one against Shitenhoji's Senri Chitose despite it being a doubles match, and after unveiling two new techniques, Tezuka emerges victorious. Before his match against Rikkai Junior High's Genichiro Sanada, Tezuka tells Oishi that this will be his last tournament in Japan since he plans to go to Germany in order to become a