The Prince Of Tennis Ova (SAFE EDITION)

The "AI" is revealed to be a prank orchestrated by Yukimura and Tezuka, who wanted to test if their teammates had grown complacent after the World Cup. The "dangerous" environment was mostly high-end holographic illusions and safe pyrotechnics.

Following the U-17 World Cup, Ryoma Echizen and the Seigaku regulars are invited to a mysterious, high-tech training facility hidden in the mountains of Nagano. The invitations are anonymous, signed only with a charred tennis ball logo. The Prince of Tennis OVA

Ryoma reaches the summit to find a hologram of his father, Ryuzaki (Nanjiro), in his prime. The match becomes a battle of "The Pinnacle of Perfection." The "AI" is revealed to be a prank