The 20-goal mark had been just a goal away since he struck against Bournemouth at the Lane on April 15.
Five games and a month later, he was still on 19 and as a couple of early chances went by the wayside at Leicester, you could feel a bit of anguish starting to creep in.
That all disappeared with a moment of magic in the 36th minute, a lovely scooped pass from Dele Alli over Leicester's defensive line to enable Sonny to volley home goal number 20 - celebrated by planting a kiss on the live TV camera.
Sonny doubled his tally with another cracker in the second half and with Harry Kane claiming four in a game for the first time, it was a night to remember and 6-1 win at the KP Stadium.
Here's what the popular South Korean had to say, plus debutant Filip Lesniak, Moussa Sissoko, who played well at right wing-back for the first time and Victor Wanyama who was, well, Victor Wanyama...
Heung Min Son
On hitting that 20 mark
"Now I can say I’m really proud but without my team-mates, without the coaching staff and without Tottenham it would never happen, so thanks to everyone, it’s a really happy night."
On those early chances
"I was a little angry because I had two really good chances and then for the third one I passed to Harry because I wasn’t confident of scoring! Then Dele made a great pass to me and I managed to finish. For my second, I wanted to pass to 'H' first of all because he could score and fight for the Golden Boot but the defender followed him and I could shoot, the shot was great and I was really happy."
On the performance and Harry Kane
"We played really well, everyone wanted the ball, everyone wanted to play and we really enjoyed it and Harry Kane, I can’t say anything, he’s unbelievable. He missed three months through injury and he’s still top of the Golden Boot, I’m really a fan of Harry."
On his Spurs debut
"Football is amazing. Three days ago I played for the Under-23s at Old Trafford and now I’m standing here having made my Premier League debut. It’s special, incredible. I felt good and was really excited to get on, for some reason I don’t really get nervous before the games. I was just super-excited and I want to say a big thank-you to the gaffer for giving me this amazing opportunity to make my Premier League debut."
On picking up an assist for the fifth goal
"I saw that Harry was one against one with the defender and a striker with his quality is usually going to put the ball in the back of the net and he did it again and scored four goals in the end. He’s one of the best strikers in the world so you’d always back him to score there, I’m really happy for him."
On the desire in the team
"We want to fight for everything and fight right to the end. We want to finish this season strongly and this was a good example of the mentality in the team. This was very special for us. It’s an incredible result. Everyone wants to keep going right until the end and to show what we can do until the end of the season. That’s the right mentality and hopefully we can now finish off the season at Hull."
On Harry Kane
"He is unbelievable. I’ve never seen this before. He’s a goal machine. If the game had gone on even longer I’m pretty sure he would have scored even more goals!"
On playing in a new role
"I felt good. It was a new position but I enjoyed playing there. I tried
to do my best and I think I did well, the team as well, what a
fantastic win! You just try to play it easy, don’t try to complicate things and as soon as the game goes on, you will be free to play your game. That’s what I tried to do and I think I did well, so that’s why I’m happy."
On the performance
"It’s a massive win. It’s never easy to come to Leicester and win but we did that, we deserved it and the scoreline is unbelievable. We dominated from the beginning to the end and showed what we’ve showed all season. We’re all so happy because Harry Kane scored four goals and now he’s top of the Golden Boot, so that is a good night for everyone."