The 27-year-old Swiss player spoke to the media after Switzerland's 6-1 win over Gibraltar on Monday which secured qualification for EURO 2020.
"At the moment he's helping us like two midfielders, because his pressing on the opposition is the best of our midfielders and his capacity to get into the box, to get opportunities to score, is very good for us", Emery said.
"He trained very well before the global break and he trained very well this morning. But I procure also, Pochettino's work in Tottenham turned into fabulous".
Gunners coach Unai Emery is in the midst of a mixed start to the season, and although Keown does not want decisions about the future of former Seville and Paris Saint-Germain general, he feels Arsenal's board will must be aware of unexpectedly changing conditions.
Arsenal should consider Mauricio Pochettino as their next manager if they decide to part ways with current boss Unai Emery, according to Harry Redknapp.
Torreira, meanwhile, hardly reassured Arsenal fans when he told Uruguay radio station Sport890: 'I need to be focused and when the transfer window arrives we will see what will happen'.
"We need to keep calm, keep positive and keep working on what we need to improve on". He trained with us.
Xhaka played in both games for Switzerland over the global break, scoring in the 6-1 demolition of Gibraltar, and has previously expressed his determination to win back his place with the Gunners.
A forward-line built around star strikers Pierre-Emerick Aubameyang and Alexandre Lacazette and supported by £72 million (RM387 million) record signing Nicolas Pepe, Mesut Ozil and on-loan Real Madrid midfielder Dani Ceballos was expected to be the side's major strength.
Speaking to SRF, Xhaka added on the matter: "I have a clear idea as to how things should proceed, and Arsenal know this as well". Spurs were struggling at the 14th spot on the league table and the club's board decided that enough is enough and parted ways with the Argentine only months after he took them to the UEFA Champions League final.
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