Daniel Amartey underwent scans on Sunday to discover the extent of a worrying ankle injury he suffered during the draw against West Ham.
The Leicester ace got his left ankle stuck in the turf while falling to make a challenge as West ham attacked and he had to be stretchered from the pitch before being admitted to hospital.
Claude Puel was unable to put a timeframe on the 23-year-old's return.
'I hope he comes back quickly and strongly,' said Leicester's manager. 'He needs to be examined and afterwards we will see.
'He made a strong game for all the battles. At the end he tries to save an opportunity, he is an example for his teammates. He improves a lot for the season.'
Ben Chilwell said: 'It didn't look great from what I saw. It was horrible. He's put his body on the line and sacrificed himself to stop a goal.
'Hopefully he can recover quickly.'
Leicester earned a draw in the 89th minute when Wilfred Ndidi's long-range effort took a huge deflection off Fabian Balbuena.
Balbuena had put West Ham in the lead after half an hour.
