Complex sentence: A combat sport or fighting sport is a competitive contact sport where two combatants fight against each other to gain enough points or a condition to declare a single winner by means of using certain rules of direct engagement.
Split into simpler sentences: A combat sport or fighting sport is a competitive contact sport where two combatants fight against each other. Each combatant strives to gain enough points or a condition to declare a single winner by means of using certain rules of direct engagement.