You can duel or become dual, for opposites often not only attract yet make the best of battle companions.
Upon that sun-warmed sand the knights duelled for sake of a perspective shift that was no more real than passing shadows.
Each one in the duel believed himself to represent love and virtue, moreover, with a more gallant perspective of one another they could have become eternal brothers.
The knights duelled in embroidered splendour upon war horses that flowed over hallowed castle grounds, a contest to settle the scores of egos while those they swore to protect died of such petty and preventable cause.