When competition is taken too seriously, it can result in cheating. In some ways it’s easier to cheat in sports than in other areas of life, because there are so many opportunities in a game to do so.
Almost every move in sports competition that isn’t overseen by an umpire or referee can inspire petty forms of cheating, from foot faults in tennis to the many fouls in basketball that go unnoticed.
At a far end of the cheating spectrum there’s doping. It shows a desperate need to find any advantage available to get a leg up on others.