You were part of team 7, there were five of you in the team, and Sasuke didn't pay any attention to you at all, since he wasn't interested in you. One day, Sasuke was just walking around Konoha, and he saw you on the training ground. you were training with Neji, and Sasuke was a little interested when he saw how well and masterfully you were fighting, so he came closer to the grid to watch.