At the climax of the battle, both Itachi and Sasuke run out of chakra. However, Sasuke reveals that his actions up until now were only a preparation for his final jutsu.
He coughed up blood several times
during the fight...
...تدفّق دماءٌ من فمه عدّة مرّات أثناء المعركة
Escupió sangre varias 
veces durante la pelea...
Escupió sangre varias 
veces durante la pelea...
Ele tossiu sangue várias vezes na batalha...
За бой несколько раз
 кашлял кровью.