The Denmark international scored and provided a beautiful cross to Sanchez, who finished with a fantastic diving header.
There was a hint of offside, but the replay seems to show that he was just onside.
58 minutes on, pressure from Vertonghen pulls Maddison to the down in the box and Michael Oliver points to the penalty spot.
5 minutes later, Eriksen doubled the lead for Tottenham. Pereira tried to clear the ball but it deflects off Skipp and straight to, the feet of Eriksen who took a touch and hammered a shot into the top-left corner of the net.
Vardy, however pulled one back for Leicester after missing the penalty. Pereira and Tielemans played a one-two with the latter curling in a pass on the floor for Vardy to finish from a close range to make the scoreline 2-1.
90′ + 1′ minutes on, Son completed the rout for Spurs. After a poor pass from Chilwell, Sissoko clears the ball ahead and there were no Leicester players back as Son collected the ball, dribbled into the box, and finished his chance.