Saka was singled out by fans and pundits for criticism, following the Gunners’ 2-2 draw with Bayer Leverkusen in the Champions League on Wednesday night.
The England winger was taken off by Arteta in the 60th minute and replaced by Noni Madueke.
Madueke eventually won the penalty that Kai Havertz converted to help Arsenal avoid defeat.
But speaking to the media on Friday, Arteta insisted that he fully trusts Saka.
He said: “We fully trust him and love him. What he’s doing for us, for this club, is just incredible at his age and he’s continued to have that massive impact for us.
“He can have an individual performance that is not probably a reflection of his level, like every human, every player in the world.
“But overall when you look at his strength and the impulse he has in the team, it’s just incredible.”
