Is professional boxing a sin?

I just cannot decide wheter professional boxing is a sin or not. It promotes discipline and respect at most times, but what i am worried about is the damage done to the opponent. A boxer dies every 2-3 years but still most boxing matches end with no big injuries. I believe that boxers die or get serious injuries because there is no governing body and boxers can fight whenever they want to and we all know boxers will fight no matter what. So professional boxers can really blame themselves for serious injuries and deaths, because of their stubbornes. How can i decide if i can watch and support professional boxing?

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Is boxing a sin?

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