(I don't have time to proofread this--I will when I get back.)
Ryoma starts out with his new evolved version of the Cool Drive, the Crush Drive, which utilizes a super spin to create an anti-gravity field around the ball. With 09 hitting the ball but getting it stuck on the racquet, Ryoma takes the first game rather quickly. But 09 simply laughs at his helplessness, and how he didn’t expect his special move to be this handy for once.
09 then activates his Noble Phantasm, the Big Fucking Anti-Gravity Gatling Cannon, which negates any gravity around the ball before shooting it back with 900 Style Hadoukyuu force. Not only that, but the 5 empty barrels shoot “gravity waves” across the court to make the opponent weightless and screw up their approach. So Ryoma is forced to volley continuous Hadokyuu level shots while utilizing air pressure from swinging his racquet to reach the ball and keep from floating away. He’s worn down rather quickly before losing the second game, tying things up 1-1.
Despite his disadvantage, however, Ryoma grins cockily at his opponent before closing his eyes. Suddenly, the arena goes dark, and Ryoma is bathed in a brilliant gold light as electricity runs across the court and to the ceiling. His eyes turn brown, his hair white, and the hair on his head grows down to his knees while a black leather trenchcoat materializes over his shoulders. The back-up lights come on, and we see MnK Type III for the very first time. Ryoma points his now elongated racquet at 09, and says in a deep voice “You still need a lot of work.”
09, still confident, hits the BFAGC as a serve—but Ryoma sprouts a black feathered wing from his back, and catches up to the ball easily to get the point. (And before you ask, no one wonders how he can fly when he just has a wing on his right side). Now unencumbered by staying level, Ryoma hits the evolved Drive A, the Atomic Drive, as a serve—but instead of hitting it at 09, he hits one of the net posts, instead, causing the BFAGC to vanish!
He then comments on how the gear in the winder glowed when 09 activated the Phantasm, the same way it glowed when Kikumaru tried to use his clones in the D2 match. Then, with a wave of his hand, Ryoma makes the floor of the court itself transparent, allowing everyone to see the various Reality Marbles, weapons and atmosphere changers underneath. Having been exposed, the ZOSS Queen is forced to use her magic to hypnotize 09, lest he spill on her involvement in the plot, and uses him as a conduit to summon early 90’s Andre Agassi.
What is considered the best rally in the series to date follows, as both players activate the Pinnacle of Perfection (though Ryoma stays in SHM mode); Agassi uses the Invisible Style, and seemingly vanishes from the court, while Ryoma uses the “Advent Children” Style, which gives him a shitload of stat boosts for no goddamn reason. The 2-on-1 rally lasts 3 whole volumes, incorporating play styles and techniques from nearly half the matches in the series. Then, out of nowhere, Agassi’s wrist gives out, and the horrified Queen realizes that she summoned him from just after the '93 U.S. Open, when he was forced to get surgery for his wrist. Her summoning time depleted, she's forced to send him back, leaving a dazed 09 looking vacantly around the court.
Having realized what happened, Ryoma uses the ultimate (and only forbidden) Alphabet Series move, the Sesame Street Drive, which entails using every English and Greek lettered move in random sequence. The resulting rally leaves 09 with 2 broken legs and a sprained ankle, due to the strain of trying to return everything. Thus, Ryoma gets the win by default, and the Earth team is one win away from winning the first match.
After this match, Ryoma realizes he can't change back because he stayed in MnK Type III for too long. Thus, Phantom Sephiroth becomes a regular on the Earth's team.