Fulham manager Claudio Ranieri had his name sung by the visiting supporters, having guided Leicester to the Premier League title in 2016.
But it was the home fans who were the loudest three minutes before halftime as Aboubakar Kamara fired home an angled shot after being played in by Aleksandar Mitrovic to give Fulham the lead.
Fulham went into the game with the worst goal difference in the league having conceded 35 goals in 14 matches. But they peppered Kasper Schmeichel's goal with shots, registering 23 attempts.
Fulham are the only side in England's four professional divisions yet to keep a clean sheet this season.
Leicester are ninth and have not lost in seven matches in all competitions. (Reporting by Christian Radnedge, Editing by Ed Osmond)
(This story has not been edited by Devdiscourse staff and is auto-generated from a syndicated feed.)