Liverpool boss Jurgen Klopp admits Harvey Elliott appears to have a dislocated ankle after their 3-0 win at Leeds United.
Elliott was stretchered off following an initially innocuous-looking sliding challenge from Pascal Struijk that ultimately saw the Leeds player sent off.
Liverpool were already firmly in control of the game by then, though.
Egyptian forward Mohamed Salah was perfectly placed to tap in Trent Alexander-Arnold's low cross and give the Reds a 20th-minute advantage, with Fabinho bundling home the second following a corner five minutes after the break.
Sadio Mane had missed a number of chances in the game, but made absolutely certain of the points with a low finish into the far bottom corner in injury time.
Leeds had their chances too, with Rodrigo firing the best of them straight at Alisson with the game still goalless.
But with a man fewer, Leeds could not muster the challenge required and have now failed to win any of their first four top-flight matches in a season for the first time since 1958-59.
Klopp said: "Harvey Elliott is in hospital, a bad ankle injury for sure. It looked like it was dislocated, the medical department put it back. Massive pain, shock for him, for us and we don't know more. We have to wait.
"I couldn't care less (if it was a red card), it is not my business. It is a serious injury, definitely for an 18 year old boy. The red card is not important. Two or three weeks we can play on, Harvey will not.
"We played a really good game until Harvey had to go, the whole team was shocked and we lost rhythm. That is normal, human. We played as good as we can against Leeds. You have to be ready for brutal intensity. The crowd was there and an exciting football game with us as the deserved winner.
"I spoke to the boys afterwards, we have to speak a little bit about the football by Harvey overshadows it. I like intense football so I probably liked the game.
"Fabinho is an incredible player with the challenges he won, we did well in many departments. Sadio Mane played an exceptional game, the crowd wanted to make him annoyed, he stayed calm and scored the goal."
Need a VPN? Or seeking to switch? Then support Tribal Football by clicking here to sign up with our official partners NordVPN. Not only will you receive the best VPN experience, but also great discounts by signing up via Tribal Football. Thanks for your support!