The sport known for its scoring system of "love," "15," "30," and "40" is tennis. This unique scoring system represents the points won by players in a game, starting from zero points referred to as "love." When a player wins the first point, they score "15," then "30," and finally "40," before needing to win the game by securing an additional point. The scoring can be complicated, especially during deuce situations, but the distinct terminology adds to the sport's charm and tradition.