Manchester United manager Erik ten Hag is unhappy with the challenge that has meant he will be without Alejandro Garnacho for a few weeks.
The young Argentine does have ankle ligament damage after a rough challenge from Kyle Walker-Peters of Southampton.
Despite Walker-Peters following through with a scissor motion and wrapping Garnacho's ankle with his legs, he was not cautioned for the incident.
"I can't say exactly at this moment, but it will take weeks," Ten Hag said of the teenager being out.
"So it's a serious injury, didn't expect, but a foul. A serious injury. Once again after Christian Eriksen, we have a serious injury after contact.
"It's not a good decision and it's difficult to make a diagnosis that quickly but I saw him limping and that's why I took him off also because it was my last opportunity to sub him and to bring on as well."
"We have the injuries and we have the red cards, so what is the combination?" Ten Hag added sarcastically.
"We have had some talks with them, yeah, but it's not about the referee, it's about us, we have to bring our performance and we have to focus on that.
"Of course it's difficult, he makes great progress, he was selected by the national team, it was a big moment for him. He's in a really good development and you don't want to disturb that process.
"Now we have to step away from it but he will be back for the end of the season. So what he now has to deal is deal with it, deal with the setback and work, invest to get back before the end of the season, because we can win a lot so he has to be back ready as soon as possible."