sakamoto's tennis competition o9

[sakamoto_jin]

Team 1
Hiyoshi
Akaya
An
Jackal
Atsushi
Tachibana
Wakato
Kenya

Team 2
Atobe
Sanada
Shishido
Taki
Kaidou
Hazue
Zaizen
Dan

Team 3
Yagyuu
Kin
Kite
Saeki
Akutsu
Masami
Aoi
Kisarazu Ryou

Team 4
Yukimura
Fuji
Niou
Oshitari
Shiraishi
Jirou
Yuuta
Miyuki

Team 5
Marui
Tezuka
Gakuto
Ryoma
Kawamura
Ootori
Yanagi
Chitose

Team 6
Sakamoto 
Yamada
Yuudai
Rai
Kamechirou
Ryoga

Pretty sure I left someone out. But otherwise, here are the teams! Amongst yourselves please decide who plays which position, and please give suggestions on how we're going to decide the winners. We could always do some test on data, as Elle suggested.

ALSO, HAPPY BIRTHDAY TO MARNY.