Slavia Prague. The Gunners sent a message of solidarity as they prepared to take on the Czech side in the Europa League last eight clash.
The fixture is being played against the backdrop of racism allegations from Rangers star Glen Kamara against Slavia defender Ondrej Kudela.
Kudela is accused of calling Kamara a "f*****g monkey" during a last 16 encounter at Ibrox in March.The 34-year-old did not travel with his team-mates to London, with the club citing injury for his absence.Kudela was served a one-match provisional suspension while the allegations are investigated.
Ahead of kick-off, Arsenal posted a picture of playmaker Emile Smith-Rowe taking the knee at the Emirates with the message: "We will always #SayNoToRacism".
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