Son struck twice as he reached 50 and 51 goals in the Premier League.
“I've scored 50 Premier League goals but without the team, without the supporters, it's impossible," the 27-year-old told the club's website.
“I just want to share this feeling with the fans, everyone in South Korea and with the lads… I just want to say thank you for helping me."
He continued: “It's really amazing! Winning is always positive but especially that way, how we won, 2-2, last seconds, a better afternoon is impossible," he said. “The lads did a really good job and I'm very proud and happy for Toby as well.
“We were 1-0 down, we didn't start too well, but we bounced back with Toby's goal and got to 2-1 up. It's a great feeling. We didn't give up. I feel bad because I had a couple of chances to score the third goal, the keeper made some good saves but luckily, I scored the last goal and I thought the lads deserved the win. In a few games we've changed the game, we've bounced back when we were 1-0 down or even 2-0 down and this shows really good character from our squad."