If you're looking for manga similar to Kuroko’s Basketball, you might like these titles. All recommendations are made by Anime-Planet users like you!
Two boys met on a stormy night: Tsukushi, a boy with no special traits at all, and Jin, a soccer genius. On that night, Jin drags Tsukushi into the world of high-school soccer.
Both main characters are not easily noticed, though Kuroko's actually good at the game.
Both characters are not the stars of the team
Both series have characters that are VERY driven to win
Both are all male sports teams competing in tournaments
Both feature enemy teams with specific strong players, and in both the thrid years/important players get injured at an important point in the tournament