Leicester midfielder Wilfred Ndidi could be sidelined for a month after suffering a knee injury in training which requires surgery.

The 23-year-old Nigerian was a surprise omission from the matchday squad for Wednesday's Carabao Cup semi-final 1-1 draw against Aston Villa.

"He nipped his miniscus changing direction - he will go in for a minor operation," said boss Brendan Rodgers.

"He will miss all of January and early February."

Ndidi has played in 24 of Leicester's 26 matches this season.