Episode 3 is based on "Game Changer", the first book and namesake of the six-book Game Changers series, of which "Heated Rivalry" is the second book.
https://www.goodreads.com/series/245053-game-changers
In contracst to the television version of "Heated Rivalry", which has been praised for its faithfulness to the book, the Scott-Kip TV version is less so, probably because they had to truncate it to fit into an episode. If you want to know more about that story but don't want to read the book and you're a Fandom member, you can see a lot of detail here but SPOILER ALERT: https://game-changers-series.fandom.com/wiki/Scott_Hunter.