Son Heung-min ended his goal drought with a scintillating 13-minute hat-trick as Tottenham ruthlessly punished Leicester's latest defensive horror show.
The South Korea striker responded to Antonio Conte's decision to drop him to the bench after a barren start to the season by coming on to curl home two fantastic strikes and slot home a late third.
Spurs trailed to Youri Tielemans' early penalty but took advantage of the Foxes' failings at set-pieces as Harry Kane and Eric Dier nodded home from corners to turn the game around.
James Maddison's fabulous first-time finish briefly drew Leicester level again, but Wilfried Ndidi's mistake allowed Rodrigo Bentancur to steer Tottenham back in front before substitute Son stole the show.