noun
sportsmanship
Refers to fair play, respect for opponents, and gracious behavior in sports and competition.
彼は勝っても負けてもスポーツマンシップを忘れない。
He never forgets sportsmanship, whether he wins or loses.
審判の判定に文句を言わないのも
Not complaining about the referee's decision is also part of sportsmanship.