Kelechi Iheanacho could only get a consolation goal for his Leicster City side as they suffered a 3-1 loss to Tottenham on Sunday.
The win takes Tottenham back to fourth place and put the pressure on Arsenal ahead of their trip to West Ham United.
Son Heung-min was directly involved in all three Spurs goals to take his tally for the season to 19, three behind Mohamed Salah in the race for the Golden Boot.
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Leicester’s Patson Daka hit the post early on before Harry Kane headed in from Son’s 20th-minute corner for his 19th goal in 18 appearances in all competitions against Leicester.
Kasper Schmeichel then denied Kane a second goal before Son doubled Spurs’ lead on the hour, slotting in from substitute Dejan Kulusevski’s pass following a brilliant tackle by Cristian Romero.
Kulusevski then teed up Son again to curl in a stunner from distance before Kelechi Iheanacho netted a consolation goal with his own long-range strike in stoppage time.
Spurs move on to 61 points, one above Arsenal having played a match more.