"Everyone will play in the position we need, so it is about where he will be better for us", Emery told reporters.
While noting that he is pleased with all his players who have all been working hard in the past few weeks, the Spanish manager pointed at Torreira as an exciting player and a good prospect.
Arsenal possible starting XI: Cech, Bellerin, Mustafi, Papastathopoulos, Monreal, Guendouzi, Xhaka, Mkhitaryan, Ramsey, Ozil, Aubameyang. "After, it's [about] where he is better for us and where he is better also thinking [about] the opposition's style of play".
Arsenal will look to build on their win over West Ham when they take on Cardiff at the Cardiff City Stadium this afternoon. "I only changed, I like fruit a lot and I like fruit juice". "We started on Tuesday and he's been with the group; he's okay, he's looking well".More news: Trump attacks Google, claims it prioritizes 'fake news' in searches
"He's training normally with the group, in every session this week", Emery said at the Arsenal news conference on Friday.
"Our demands are very high, very great, but I want to ask every player, every day, to give us more", Emery said. It was the first controversy that Emery has had to deal with since coming to England, but the Spaniard said he wasn't bothered by it.
"It's amusing, because I spoke to the Rosenborg captain [Mike Jensen] on the pitch in Trondheim after we played them and he said "Congratulations, maybe see you next year again", said Celtic manager Rodgers.
It certainly seems as though Emery is taking a firmer approach than Wenger, whose light-touch approach to a number of squad issues drew criticism during his final seasons in north London. Ozil is fit and available for selection.