Tezuka has been absent from practice due to his injury and Oishi gets everyone together to do something special.
It can increase the speed
of your serve, too.
So lässt sich sogar
dein Aufschlag beschleunigen.
También puede aumentar
la velocidad de tu saque.
Et tu gagneras aussi en vitesse
au service.
Também pode aumentar
a velocidade do seu saque.