I found this promo for the anime second season:
https://www.youtube.com/watch?v=tqXatT6kGM0
The match between the 5th and 6th graders are shown indicating it will cover at least until up to vol 11. The match should occur at around the end of the season so it's weird that scenes from it are shown in the promo. Maybe the scenes in the promo will be the opening of the first episode (the episode opens with scenes of a match that will occur in a later episode just like how it was in the season 1's first episode), or worse the anime's second season will skip a lot of things.