no. 4

More or less a random thought really, but I could see Tokugawa being the original No. 4 of the 1st String. I guess the first assumption to make here is that they didn't ditch a random guy somewhere in Korea, but that it was really only 18 players leaving for the exhibition matches. While...

So Ryoga just comes in, takes his spot, and then they leave to Japan? Poor guy's stuck in another country because he lost a game of tennis.