ATENCIÓN. Apareció el video con el que los árbitros tomaron la decisión de anular el penal de Julián Álvarez. "Aunque fue mínimo, el jugador hizo contacto con el balón con el pie de apoyo antes de patearlo", comunicó UEFA. pic.twitter.com/HvB7tUt4oZ

The controversial decision to disallow Alvarez's penalty could prompt a rethink of the laws - and quite right, too

Valverde scored and Real were suddenly 3-1 ahead rather than 2-2 from the spot. Antonio Rudiger eventually scored the final penalty to send Real through 4-2 in the shootout. Whether Alvarez had actually touched the ball with both feet remained a talking point after the game, with initial replays not entirely clear on the matter.