Tielemans is still struggling with a calf complaint while Pereira is nursing a "lingering" hamstring injury.
"Youri is still a little bit of time away, but he's progressing well," Leicester manager Brendan Rodgers told reporters. "[He'll be back] maybe within the next couple of weeks.
"Ricardo won't be available. That hamstring [issue] is lingering a little bit, so he will be out for a few weeks also. We'll just continue to monitor that, but otherwise the squad is the same."
Fixtures are beginning to crunch together for the Foxes as the winter fixture schedule condenses but, despite the challenges posed to recovery time between games, Rodgers has been enthused by preparations.
"I've been really pleased with what I've seen with the work we've done," he added. "We haven't had a great deal of time, but we've been able to do some great work and hopefully we'll see that out on the field of play."