Would have been a great breakout fight for Yamato to really show his abilities, obviously Sasuke would have won but Yamato hasn't really gotten a good 1v1 fight
Yamato actually said that he didn't want to do it in front of Sakura and naruto but after that point he would get serious. So if
Oro hadn't have turned up he would have handed out a smack down. He can use an all element shunsenju thing after all.