Torreira is thought to have agreed a move to the Emirates but has yet to undergo his medical at the club.
And Arsenal hero Pires was impressed with his display for Uruguay.
He said: “I like Torreira a lot. I was surprised by his performance.
“He plays it simple and is always well positioned on the pitch."
Torreira will hope to have another big impact for Uruguay when they take on France in their World Cup quarter-final on Friday.