Why was Alvarez’s shoot-out pen vs Real ruled out – and should it have been?​

Julian Alvarez’s spot kick was controversially ruled out in Atletico Madrid’s shoot-out defeat to Real Madrid in the Champions League – but why was it disallowed, and did the forward even break the rules at all?Julian Alvarez’s spot kick was controversially ruled out in Atletico Madrid’s shoot-out defeat to Real Madrid in the Champions League – but why was it disallowed, and did the forward even break the rules at all?