Oikawa Toru is not a Genius Episode 20

Oikawa and Kageyama continue to match up head-to-head a s they try to prove whose the superior setter. Their junior high days competing against each other are shown, and when Aoba Johsai begins to predict Kageyama's moves a shocking move is made as Sugawara is subbed in for Karasuno. Will this be a blow for Kageyama's ego that he can't overcome?