The Uruguayan played in a slightly more advanced role against Eintracht Frankfurt in the Europa League.
It worked and he managed to help his side to a 3-0 away win.
And Emery spoke about that adjustment after the game.
He said to the club's official website: "Tonight he [Torreira] played very well and this season it's the first match that he was feeling physically very good in. He was able to go from box to box and I want to use his quality.
"His qualities are that he can give us good pressing, and he can win the ball high up the pitch to give us the possession to score. He did that tonight.
"After, we need someone with the ball and in his position, he can help us with the build-up."