However, he conceded that the benefit may not be as clear cut in Sunday's F1 race, due to the higher dependence on aerodynamics.
Sainz, who recently questioned the balance of risk and reward at Spa due to the large run-off areas, also likes the fact that Mugello is lined with gravel.
"Honestly, the track itself for me is fun," he said. "It's a bit repetitive with the same kind of corner. But it's really good fun. But mainly what I like on this track, there's two things.
"It's the gravel traps, I think it's great to see the gravel traps back, and it's probably going to give the FIA some confidence that these kind of run-off areas work to protect from track limits and all those issues that we're having in other tracks. So it was nice to see.#####