You're kidding right? Everytime Kaguya opens the portal she attacks from behind.
Sasuke doesn't need to swap Naruto with an object to teleport him.
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Naruto has no idea how the technique works and until he finds out - there's nothing he can do about it.
Sasuke teleports behind him, by swapping with one of Naruto's gudoudama, and if Naruto tries to react to Sasuke's attack, he gets teleported to a different spot. Don't bring up the cool down time either because there isn't one.