Manchester United winger Alejandro Garnacho caused an angry reaction from Galatasaray goalkeeper Fernando Muslera after celebrating opening the scoring in front of the home fans on Wednesday night.
Garnacho finished off a fine team move to give United the lead, and proceeded to stick his finger to his ear, seemingly calling for more noise from the home supporters in what was already a red-hot atmosphere.
Boos rained down from the stands, and after a few seconds Garnacho appeared to put up a hand to apologise to the irate Galatasaray fans.
But that was not enough for Muslera, who raced out of his goal to give Garnacho a piece of his mind.