I don't know what brand the clothes of the princes of Qingxue were. On the left side of the clothes, there is only SEIGAKU(SEIGAKU is the English name of Qingxue, and they are Qingxue, so SEIGAKU is printed instead of this brand). Later, after about 23 episodes, YONEX was added to the left side of the clothes, because YONEX is a sponsor of the animation version. Even Longma's tennis racket has changed from BRIDGESTONE to YONEX's. As for Longma, its favorite brand is FILA. Fujibu's tennis equipment is all PRINCE's, while Tezuka likes Japanese local brand MIZUNO, and DUNLOP, WILSON and PUMA are also the brands that princes love to use in the animation version.

Fu:

In China's live-action version, they used HEAD and PUMA because they sponsored the TV series. If you respect the original work, the dragon horse should be window FILA, and the team uniform should be YONEX, including tennis equipment. In the Japanese live-action version, the dragon horse played by 15-year-old Kanatee is wearing a FILA hat.