Since his Bosman arrival from PSG this summer, Rabiot has battled for a regular run under Sarri.
But after victory over Udinese, the Juve coach insisted: "He's been improving for two games. It makes me feel like he needs playing time right now.
"He struggled in the first-half against Leverkusen before being better in the second. Currently, he needs minutes. He is clearly improving.
"Today, he has sacrificed a lot even in the defensive phases. I think he can do even better."