Claim: One form of ground fighting is Brazilian jiu-jitsu.
Evidence: Brazilian Jiu-Jitsu -LRB- -LSB- dʒuːˈdʒɪtsuː -RSB- -LSB- ˈʒiw ˈʒitsu -RSB- , -LSB- ˈʒu ˈʒitsu -RSB- , -LSB- dʒiˈu dʒiˈtsu -RSB- -RRB- -LRB- BJJ ; jiu-jitsu brasileiro -RRB- is a martial art , combat sport system that focuses on grappling and especially ground fighting.