The France global made his first start of the season in the 3-2 win at Cardiff before the worldwide break and made a decisive contribution by setting up Aubameyang's first goal of the season, before scoring a late victor.
Arsenal striker Alex Iwobi is hoping to play a role in the Gunners English Premier League clash against Newcastle on Saturday.
Firstly we need to win and I think it is very important that in the last match we won.
However, Emery insists that the Monreal he is seeing at Arsenal is a "new" one who, in spit of his advanced age, is playing at a very good level.
"I have a very good relationship with Mesut and professionally I push him for improvements to give us the best in his qualities and performances".
Also available are Pierre-Emerick Aubameyang and Mohamed Elneny who were away to global duties with Gabon and Egypt.
"The first time, maybe, he could feel different but every day with us in the work, I look at him and he looks well and happy, working with our demands every day", said Emery.
Torreira picked up a minor calf issue while away with Uruguay last week but he's trained fully since returning to Arsenal and is available for selection so I wouldn't be surprised to see him start against Newcastle this weekend. "I don't know any other news from him".