Agari will be better in the match but she may not win. I predict she will take the lead (in sets) and the lead in points in the final game and crush bear girl's spirit and forfeit the match to let Koyori play.
I think the friendship story there is supposed to be a tragic tale of what could of been, maybe she'll have fun playing with Agari, but more likely she'll get really jealous of Koyori. Could even be an on going story.
But because Koyori said Agari will win she will at least choose to lose, rather than be beaten.
