sul suo volto

on his/her face

→ sul
phrase Rare #39,020
on his/her face Used to describe an expression, look, or something physically located on someone’s face. The possessive suo can mean his, her, or its depending on context.
IT: La sorpresa era evidente sul suo volto.
EN: The surprise was obvious on her face.

Le mutande della vittima sul suo volto, come con Hyang-sook.

The victim's underwear on his face, like with Hyang-sook.

— Memorie di un assassino (2003)

Lo sguardo sul suo volto era impagabile.

The look on his face was priceless.

Giudicando dall'espressione sul suo volto, lei era preoccupata.

Judging by the expression on her face, she was worried.

Sul suo volto?

On his face?

— Non dirlo a nessuno (2006)

È scritto sul suo volto.

It's written on his face.