Benzema opened the scoring after referee Ignacio Iglesias Villanueva penalised Enis Bardhi for blocking a Luka Modric cross with a raised arm, but only after checking the incident on the pitch-side VAR screen.
Villanueva awarded a second penalty after Casemiro went to ground following a wild attempted clearance by Cheick Doukoure, although there appeared to be minimal contact between the players.
Carvajal, though, said he heard Doukoure kick Casemiro and thinks the officials should be trusted to make the right call when VAR is available.
"The first one, at half-time, they told us that he was covering his face. The second, I heard the kick from 25 meters away," said the full-back, as quoted by Marca.
"Im not a referee; I dont assess the decisions. If both the referee, who was close, and VAR have ratified the penalty decision...
"Other times, we have been hurt and nothing has happened. Being a referee is difficult and we have to keep working independently of that."
Carvajal admits both games at the Santiago Bernabeu are of huge importance if his side are to keep chasing for trophies.
"Until maths tells us we cant [win the league], we wont say goodbye to it," he added, "For us, the game against Barcelona is a final, but we have the match on Wednesday first."
Source : Goal.com