ROSTOV-ON-DON, RUSSIA - MARCH 9, 2017: Referee Felix Zwayer shows a yellow card to FC Manchester United's Henrikh Mkhitaryan (4th L) in Leg 1 of their 2016-17 UEFA Europa League Round of 16 football match against FC Rostov at Olimp-2 Stadium. Valery Matytsin/TASS (Photo by Valery Matytsin\TASS via Getty Images)
