Son made one appearance from the bench for Spurs before linking up with South Korea's Asian Games squad earlier this month.
The victor will progress to face either Japan or the United Arab Emirates in the final on Sept 1.
Son has become an increasingly important member of Tottenham's team in recent seasons after a hard first campaign at the club, and scored 18 goals in 52 appearances for Spurs past year.
Tottenham is coming off a huge 3 - 0 win against Manchester United in the Premier League.
"Nah, the game was too late. was hard to watch but I was very happy (for) my team", he said.
This law had been looming over Son, who recently turned 26, and winning the final could provide his last chance to avoid military service. "We're one team and I have to be ready to play for my team".
India moved up to third on the track behind China (11 golds) and Bahrain (9) after collecting its fourth and fifth gold medals from Arpinder Singh in the triple jump and Swapna Barman in the heptathlon. Iran will now have to face China in the final, for their first ever Asian Games gold. Back in 2014, the team won the gold medal but Son was not part of the roster. Bunga Nyimas, who is 12, placed fourth for Indonesia. World Cup bronze medalist Keyaki Ike won the men's street final.
Malcolm Turnbull to stand down if spill motion goes ahead
Throughout the afternoon, rumours have surfaced of an upcoming party room meeting with the agenda of replacing Mr Turnbull. Liberal deputy and Foreign Minister Julie Bishop will throw her hat into the leadership ring.
With skateboarding's Olympic debut at Tokyo 2020 on the horizon, the Japanese showed their preparations are going well at the Jakabaring Sport City SkateBoard Stadium.
China's Wang Qingling won silver with 5954 points, while Japan's Yuki Yamasaki took bronze with a tally of 5873 points.
Since women's handball was introduced at the 1990 Asian Games in Beijing, Korea has missed out on gold only once, in 2010.
Son, who plays for north London club Tottenham Hotspur, provided the assist for the second goal scored by Hwang Ui-jo, who has now scored nine goals and is the tournament's top scorer.
A 3-1 win over Vietnam on Wednesday set up a final against Japan and there's plenty riding on the result. "We can beat any team in the final".
Uzbekistan's Muso Sobirov, left, competes against Tajikistan's Behruzi Khojazoda during their men's -81kg kurash match at the 18th Asian Games in Jakarta, Indonesia, Wednesday, Aug. 29, 2018.