The Gunners dominated the game for long spell but were held to a 0-0 draw by the visitors who put up a disciplined performance at the back.
Arsenal had already beaten Thursday's opponents in this season's tournament, triumphing 1-0 in Portugal last month, and Emery said the draw at the Emirates had demonstrated the significance of securing that prior win in Lisbon.
He was replaced by Pierre-Emerick Aubameyang and carried from the pitch on a stretcher after receiving treatment on the pitch fr several minutes.
But the Gabonese striker failed to leave his mark on the game, missing a host of guilt-edged chances.
Aubameyang thought he had a late one-on-one to settle the contest but was fouled by Mathieu, who was shown a straight red card for the cynical trip.
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A proud Palestinian, Tlaib has also been an advocate for Palestinian rights and is an outspoken critic of Trump. Omar (D), 36, fled war-torn Somalia in the '90s and lived in a refugee camp before moving to the US.
Arsenal legend Martin Keown was in the BT Sport studio after the game and offered a very honest opinion on Aubameyang's current situation.
He's got a point.
"For me, football is about levels and, if you don´t defend properly and you don´t do the basics well enough, high-level players and high-level teams normally punish you and that was the case tonight", Gerrard told the Rangers website.
The Gabon striker was certainly Arsenal's liveliest attacking outlet and he sent another shot just wide of Renan Ribeiro's goal as Arsenal looked to snatch the lead.
"If I'm Aubameyang I'm looking around thinking I want to score goals like Kane or Aguero". First it's in your mind - you think for the player.