Is it permissible to participate in martial arts contests like wrestling and karate and the like, which usually lead to some harm?

Fatwa, posted 4.22.2010, from Iraq, in:
Religious Authority: 
Ali al-Sistanti
Fatwa Question or Essay Title: 
Is it permissible to participate in martial arts contests like wrestling and karate and the like, which usually lead to some harm?

Yes, as long as no serious harm is done.

هل یجوز المشارکة في المباریات القتالیة کالمصارعة والکاراتیه ونحوها مما یؤدي غالباً الی الضرر المعتد به؟ یجوز مع الأمن من الضرر البلیغ.