Another midfielder, Andy King, is also unavailable as he is on international duty with the Wales Under-21 squad, while striker Steve Howard completes a two-match suspension.
But Sweden Under-17 international midfielder Astrit Ajdarevic could be included in Nigel Pearson's squad after joining on loan from Liverpool for the remainder of the campaign.
Leicester's charge towards the title has started to stutter recently after just three wins in their last 10 games.
Second-placed Peterborough have narrowed the gap and have the chance to go within four points of the Foxes when the two sides meet in Saturday's 12pm kick-off.
And in-form Peterborough welcome back Gabriel Zakuani.
The former Fulham defender sat out Posh's fifth consecutive League One victory at Bristol Rovers last weekend due to a one-match suspension, but he will come straight back into the side.
Chris Westwood is set to make way for Zakuani but boss Darren Ferguson is unlikely to make any other changes to his side.
Craig Morgan is still struggling with a toe injury and the defender would not have been in contention in any case as he has joined up with the Wales squad.
Midfielder Lee Frecklington is rated as doubtful after he suffered a setback in his recovery from a hamstring injury this week.
Jamie Day remains sidelined with a long-term back problem.
Sporting Life