Son, 26, scored his 15th goal of the season in just his 31st appearances for Tottenham, as he put the result to bed in injury time - in a match that could have ended very different.
Spurs took the lead through Davinson Sanchez, but had Hugo Lloris to thank for a number of saves - including a penalty save from Jamie Vardy. Christian Eriksen doubled the lead, before Vardy made up for his miss. But Spurs won 3-1.
During the match, referee Michael Oliver showed Son a yellow card for supposedly diving to win a penalty under the challenge from Harry Maguire. Replays showed that there was contact, and both Son and Sugar responded on Twitter.
It’s a pen. The only player guilty of simulation there was the defender for claiming there was no contact & implying Son cheated. https://t.co/KMB52CFDnm— Ryan Mason (@RyanMason) February 10, 2019
The win for Spurs sees them sit in third place, five points behind both Liverpool and Manchester City - though leaders City have played an extra game than both Jurgen Klopp's side and Spurs.
Spurs have a difficult run of games coming up, facing Borussia Dortmund on Wednesday before taking on Burnley, Chelsea, Arsenal and then a return leg in Germany against Dortmund.