That's according to former Chelsea striker Chris Sutton, who believes the Uruguayan international is not a high-quality midfielder.
Torreira left the bench to make his debut at Arsenal in the 2-0 loss to Manchester City.
Sutton said: "I do not think Lucas Torreira is a great coach, but he is tenacious and loves tackles.
"Arsenal needs players to do the dirty side of the game and that is why they have brought it.
"He has come and is trying to add a bit of intensity."
Raheem Sterling and Bernardo Silva did the damage to stop the mood at Emirates Stadium for Unai Emery's first game in charge.
Arsenal could not test City's goalkeeper, Ederson, and Sutton believes they lacked inventiveness.
ARSENAL 0 MAN CITY 2: FIVE THINGS WE LEARN
"Let's not judge Arsenal in this performance against the best team on earth," he said.
"I think they have shown guts, determination and desire, but I have been disappointed with them in the last third.
City squandered a series of opportunities, including a glorious individual opportunity for Sergio Agüero.
And Sutton thinks they should have won for more.
"It could have been much more comfortable for Man City today," he said. "I think that will be the frustration for Pep Guardiola today.
"So many possibilities but not clinical enough in the last third".
"Raheem Sterling, however, has been electric and looks as sharp as a nail."
Arsenal made the short trip to Stamford Bridge to face Chelsea on Saturday.