He would've easily cut Naruto down. As we all know, Sasuke completely chewed naruto apart in the hand to hand combat portion, so if he pulled out his sword for even the slightest interval, he would've took Naruto's life. People say that Naruto was holding back, but I'm pretty sure it was Sasuke just disallowing that man Naruto to prosper within the fight. He didn't even let him weave handseals until he got too far away. On top of the precog his Sharingan grants him, can't he just Almighty Push naruto into oblivion lol. Using that At close range would've been a GG.