The outcome is determined by how much dedication you have to the to correct practice, applying the knowledge you learned from other wrestlers, coaches and lessons learned on the mat.
Endurance is one of the key factors.
You can have all the muscles in the world but if you run out of steam you're history. The sport is a series of moves and counter moves. Endurance plays a vital role in keeping up with your opponent. If you are equal in skill then the wrestler with endurance and heart will win. Technique is critical to your performance.