Leicester stretched their unbeaten home run to 20 league games as the Foxes followed up their midweek Champions League win with victory over Crystal Palace.
Ahmed Musa scored his first goal for the club, while Shinji Okazaki and Christian Fuchs struck after the break to secure a convincing win.
Yohan Cabaye scored a consolation for the Londoners and Palace pressurised the hosts in the final five minutes as they attempted an unlikely comeback.
But it was too late against a Leicester side who showed something of the form that won them the title last season, even without England striker Jamie Vardy in the starting line-up.