Two arena matches, standard rules.
Fight #1:
Twelve Klingon warriors vs twelve Uruk-Hai (movie versions).
The Klingons get their traditional melee weapons and armor; Uruk-Hai are outfitted as in the film. No bows, no energy weapons.
Fight #2:
Worf (DS9) vs Lurtz, the commander of Saruman's Uruk-Hai (the one who fights Aragorn at the end).
Worf has a Klingon sword and Lurtz has a typical Orcish sword.