The Egyptian was relentless in midfield for the Gunners at Old Trafford.
And having come close to leaving the club this past summer, it seems Elneny is now one of Arteta's most loved players.
"What Mo transmits to the team is special," Arteta said. "He has this energy as a person.
"He goes in the room and he creates that atmosphere. Today I said that we needed that energy and that positive feeling that he brings all the time. I think he was tremendous.
"Obviously I played with him so I know his qualities and who he is as a person, and what he brings to the squad. I like players that have zero ego, who play for the team, who want to contribute regardless of what it is, whether that's one minute or 96 minutes or just by being there and giving positive feedback all the time.
"He contributes to our culture and is a person who admired by everyone at the football club. And now I think his qualities he's showing as a footballer, I always believed he had them."
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