Madrid, Jan 8 (IANS): Real Madrid coach Santiago Solari said on Tuesday that sometimes he does not understand how the Video Assistant Referee system works and, following the controversy involving his Brazilian forward Vinicius Junior during a recent La Liga game against Real Sociedad, the head coach called for clearer rule application of VAR.

Real Madrid claimed that VAR did not notify the referee of a penalty in Sunday's 0-2 loss after Vinicius clashed with Real Sociedad's goalkeeper Geronimo Rulli, reports Efe news.

"VAR depends on the rules being clear. If they are clear and they are always applied in the same type of actions and decisions, that makes it easier for everyone to understand: player, press and fans," the Argentine coach said at a press conference prior to Real Madrid's Copa del Rey match versus Leganes.

Real Madrid is set to take on Leganes for a Copa del Rey round of 16 match on Wednesday and currently occupies the fifth place in La Liga, 10 points behind leader Barcelona.