You were Sasuke's twin brother or Sister, it was the preliminari rounds of the last part of the chunin exams, while sasuke was fight he got pinned down by his opponent, his opponent started taking his chakra, sasuke started getting weaker

Naruto: "COME ON SASUKE!!"

Sakura: "sasuke..."

(other canadets: Ino,Sakura,rock lee, neji, tenten, shino,shikamaru,choji,kiba,hinata,Naruto,gaara,Temari,Kankuro.)