In Haikyuu!!, sportsmanship plays a crucial role in showcasing respect, teamwork, and fair play among the characters. The show emphasizes the importance of supporting your teammates, showing respect for opponents, and playing with integrity. Characters exhibit good sportsmanship by encouraging each other, acknowledging their opponents' skills, and accepting victory or defeat gracefully. Overall, sportsmanship in Haikyuu!! is portrayed as a fundamental value that contributes to the development of both individual characters and the team as a whole.