Throwback to a scene from Game of Thrones... only with Zuko and Sokka.

The Sun was shining down on him as he sat lotus style in front of Sokka, who was doing the same. They mirrored each other as they both held their arms up with a sword laying across the backs of their wrist. Their shirts had been removed before they dared each other to this ridiculous game. It was out of boredom when Sokka suggested they spar. But this was the warmup round. Whoever lowered their arms first lost while the winner chose what weapon to fight with. But Zuko knew how to quiet his mind and focus on everything else. "Are your arms hurting yet?" Sokka asked while Zuko remained unbothered by the other man. "Are yours?" He cracked his right eye open to see if Sokka showed any sign of giving up. "No." There was a slight shake to Sokka's shoulders while Zuko remained in control of his calm state. Besides the heat of the sun and the small drops of sweat on his brow, he was actually holding up well. "Then I'm not feeling anything either." The firebender inhaled deeply with a small smirk on his face. "I'm content."

This is a Zutara fic, but it could easily go Zukka.

I just love writing Zuko and Sokka as besties...

Hey, I get it. They work together, too.