Liverpool manager Jurgen Klopp has been left sweating over the seriousness of Mamadou Sakho's knee injury after the centre-back was photographed leaving Anfield on crutches.
Sakho went down after landing awkwardly on his right knee against Crystal Palace and appeared to be in some pain. He attempted to continue but was eventually replaced for Dejan Lovren.
The 25-year-old was later seen leaving the stadium with his knee in a brace and on crutches as Liverpool's medical team fear another serious knee injury.
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After the match, Liverpool manager Jurgen Klopp said: "It's too bad that he couldn't play on, but we have to wait for the scan tomorrow evening because it needs a little bit of time.
“I don't want to speculate, but, of course, we hope that it's not too serious. That was the worst thing in the game, I would prefer to lose 4-1 and keep him in the team. Now we have to see.”
Klopp would go on to see his Liverpool side lose their first game under his stewardship. Goals from Yannick Bolasie and Scott Dann would earn the Eagles a 2-1 victory – their second consecutive win at Anfield.
But with Sakho emerging as a key player for the Reds in recent weeks, fans will be more concerned with the wellbeing on the France international than their shock defeat to Alan Pardew's men.
Liverpool have already lost Danny Ings and Joe Gomez for the remainder of the campaign with ACL damage while Daniel Sturridge has spent the majority of this season on the sidelines with a knee injury of his own.
Sakho has already withdrawn from the French national squad and the extent of his knee injury is likely to be confirmed in the next 24 hours.