The Real Madrid midfielder has seen team-mates Vinicius Jr and Aurelien Tchouameni abused in recent weeks.
The Gunners face frequent Champions League conquerors Bayern Munich in Wednesday’s quarter-final second leg.
Striker Niclas Fuellkrug on Tuesday backed Borussia Dortmund for a return to Wembley, 11 years after the club last reached the Champions League final at the same stadium."We're playing in a Champions League semi-final.