England left-back Ben Chilwell is simply a uncertainty for the World Cup aft suffering a hamstring wounded successful Chelsea's Champions League triumph against Dinamo Zagreb.
The defender, 25, pulled up successful stoppage clip aft clutching the backmost of his leg.
He was incapable to proceed and was pictured leaving Stamford Bridge connected crutches pursuing the Blues' 2-1 win.
"It doesn't look positive," Chelsea brag Graham Potter said.
"It's a stroke for america connected an different affirmative evening I think. It's a stroke to spot him propulsion up similar that, it's not a large sight.
"So fingers crossed erstwhile we get the scan it isn't bad, it tin beryllium not severe, but we person to person fingers crossed astatine the moment. But intelligibly we're disappointed."
England footwear disconnected their World Cup run successful Qatar against Iran connected 21 November.
Chilwell has been capped 17 times and was portion of the England squad astatine Euro 2020, though helium did not marque an quality during the tournament.
He suffered a ruptured cruciate ligament successful November past twelvemonth and was ruled retired until May.
Asked if the wounded is simply a interest for the World Cup, Potter added: "I deliberation you'd person to accidental so.
"Obviously I don't privation to accidental immoderate much than that but erstwhile a subordinate pulls up similar helium did, and helium felt it, it's ne'er positive.
"It's a stroke for america and a stroke for him and sadly helium won't beryllium the lone 1 who's affected similar that successful this play due to the fact that October was incredibly challenging, the games that we had to play, but it is what it is."
'Heartbreaking truthful adjacent to World Cup'
Former England manager Glenn Hoddle said connected BT Sport: "I consciousness for [Ben Chilwell], dreadfully. Sometimes with a hamstring you get a small informing sign. That's erstwhile you enactment your manus up.
"That 1 conscionable went. His look went and arsenic helium touches the shot helium grimaces and looks successful existent pain. It looks similar a nasty one. I don't recognize wherefore they haven't carried him off.
"That's specified a blow. I americium gutted for him."
Former Chelsea and England midfielder Joe Cole said helium felt for Chilwell fixed however adjacent it is to the World Cup.
"It's heartbreaking," helium said connected BT Sport. "As soon arsenic it happens each you tin deliberation astir is that it is truthful adjacent to a World Cup.
"If it's a hamstring wounded usually the slightest you tin anticipation for is 2 to 3 weeks earlier you get backmost connected to the pitch. It's truly tough. I truly consciousness for him."