Cameroon manager Hugo Broos was left confused by the latest incident involving the Video Assistant Referee (VAR) in his side's 3-1 Confederations Cup defeat against Germany on Sunday, and said the referee didn't give an explanation afterward.
With Germany up 1-0, Cameroon's Ernest Mabouka struck Emre Can with a high boot but referee Wilmar Roldan initially showed a yellow card to Sebastien Siani by mistake.
Upon consulting VAR, Roldan gave Siani a red card for Mabouka's offence. Cameroon players then persuaded him to review the footage again, after which Roldan sent off Mabouka.
And Broos told reporters after the match he was never given an explanation from the referee.
"I think everyone is confused, even me," Broos said. "I didn't know what happened, it was a yellow card then a red card, then a red card for another player.
"Don't ask me what really happened! I didn't understand it and I don't now, either. After seeing it again maybe then I can answer your question but this is something for the referee himself.
"The referee did not give any explanation. First of all he gave a red card to Siani so people from VAR called him back and said it was the wrong player, so they reviewed the phase of the game and realised it was Mabouka."
Broos, whose side finished bottom of Group B with one point, called the decision harsh.
"In that particular case both players had their foot very high, the German player and the Cameroon player, so I don't see why the referee had to give a red card," Broos added.
"It's a foul but both players had their foot high to try to reach the ball. I don't understand why only my player received the red card."
Joachim Low -- on the heels of his 100th victory as Germany manager -- added VAR needs to be improved.
"I spoke to Emre Can who was involved and he was touched, definitely, but he didn't think it was a foul," Low said.
"I didn't see it on the video screens, I saw the referee showed the red card and returned to the bench for another look and then he awarded the red card [to Mabouka]. I saw he touched him but it wasn't a mean foul with intent to hurt the opponent, it was an unhappy coincidence and not intentional.
"In terms of the general use of the VAR, we need to get used to it but at least in some cases it has been proven useful, for instance offside goals. It can be fine-tuned so decisions can be made quicker."