The first time he had a fight with Sasuke was when all the girls in his class started to get crushes on Sasuke.
They had turned ten when the girls started thinking about boys and getting crushes on them. Well, on Sasuke. The whole female population was completely and utterly in love with him. Naruto had even overheard several of them saying that they would somehow get married to him when they grew older. Sasuke, on the other hand had no interest in any of them. Whenever a girl so much as looked at him he would either glare or walk away. If he glared the girls would be happy that he looked at them and they would say that he must like them, but if he walked away they would giggle and whisper about how the only reason he wouldn't stay is because he had to train in order to get stronger because he was just that awesome.
He didn't recognize the first girl that he saw confess to Sasuke. She had bobbed brown hair and dull green eyes, and was wearing the smallest thing that a girl her age could wear without getting into trouble, a bright pink spaghetti strap dress that had frills at the bottom and ended at her knee. Naruto even thought that he might have seen a little bit of lip gloss on her lips. She had blocked Sasuke's path to his training grounds and then very quietly, and with stuttering words, she had confessed her undying love for him.
Sasuke's eyes darkened with anger and frustration at her fake love spawned by her pity and respect for Sasuke as well as everyone else's looks towards him. Because, after all, kids like to follow the adult's lead and they had mistaken the adult's motherly affection for love. Again Naruto could see that Sasuke only wanted to be left alone. To be invisible.
Naruto wanted to make Sasuke happy so he did the only thing he could think of at the moment. He took the attention and put it onto himself by yelling, "Sasuke!" and jumping out from behind the tree he had hidden behind when he had seen them. Sasuke looked surprised at first, but after seeing Naruto had taken out a weapon he took out his own and put himself into a defensive position. "I can't believe you're stealing all the attention again," he growled as he launched himself forward and tried to attack Sasuke. Tried being the key word. Sasuke had very simply flipped him over onto his back and punched him in the gut.
"You're so cool Sasuke-kun!" squealed the girl as Sasuke turned away from him.
"Don't turn your back on me," growled Naruto as he stood up holding his stomach which was already beginning to heal, "I'm not done with you yet!" He lunged forward again and was again thrown onto his back, but this time Sasuke sat on his stomach and held his kunai to his neck. He knew then that he was defeated, but he didn't mind because Sasuke's eyes had also brightened with the challenge.
"You'll never beat me Dobe." That was also the first time that Sasuke had called him a Dobe.
Yay for the next chapter! this is 2 of 4.