"First set point"
That feels like a bit of a spoiler if that's really a direct translation. They were already at "set point" near the end of last chapter, when over the course of a single page they were at 24-23 (and then Nekoma caught up to 24-24). So now we should expect Karasuno to win on the next point.
In particular it was this page https://mangadex.org/chapter/323373/15 when tanaka failed his serve.
