Board Thread:Naruto News/@comment-945885-20150423073012/@comment-24357950-20150423095325

Well, my guess is that Kishimoto designed Sarada to look like a female Sasuke. And if we go back in time, we'll remember that many fans thought that Karin looked like a female Sasuke to during her debut in the manga. I think the reason for the fact that Sarada looks nothing like Sakura and 100% like Karin is that both Sarada and Karin look like female Sasukes (one intended, the other unintended). Kishimoto probably found out about several fans pointing this similarity out, so he decided to turn it into a little joke.