Leicester boss Brendan Rodgers is unsure how long England midfielder James Maddison will be absent with a knee issue that has come "indirectly" from his time at the World Cup.
He did not play at the World Cup and missed the Foxes' Premier League defeat by Newcastle on Monday.
"It's a different part of his knee," Rodgers said after the defeat.
"He obviously had a problem with the back of his knee; now he has something at the front.
"This is something that has come from indirectly having an issue while he was away.