So you are right and the rest of the wrestling world is wrong. The rule book is wrong and every one naming their team events are wrong. A duel is between 2 individuals and not between 2 teams. Each contested match by definition could be considered a duel. If you are in the wrestling world though you know it is a match, the same as boxing. It is called a dual for the number of teams participating. What dictionary are you using that states a duel is between more than 2 individuals?