Mazic was subsequently demoted to be a fourth official for the remainder of the tournament -- .
Is back in action for Arsenal trip to take on Besiktas at the 76,000 - seater Ataturk Stadium in Istanbul on Tuesday .
Mazic was subsequently demoted to be a fourth official for the remainder of the tournament -- but is back in action for Arsenal trip to take on Besiktas at the 76,000 - seater Ataturk Stadium in Istanbul on Tuesday .