Son needs his team to win the gold medal if he is to be exempted from South Korean military service.
Son is now representing his country at the Asian Games and if the team is successful, the squad will avoid having to take a break from their careers.
The victor will progress to face either Japan or the United Arab Emirates in the final on Sept 1.
"Back then (in 2002) I was an assistant coach, but now I'm a head coach", Park said after Vietnam's quarterfinal win over Syria set up a semifinal showdown against the South Koreans. s " We were stopped in the semifinals in 2002, but this time we will have a different result". "We're one team and I have to be ready to play for my team".
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.
Darting in behind the Vietnamese defence, Hwang - hat-trick hero of Korea's 4-3 quarter-final win over Uzbekistan earlier this week - clinically hooked in his ninth goal of tournament.
Let's give you the latest from Jakarta and Palembang - the host cities for the 2018 Asian Games.
Cleanup Park Byung-ho launched a three-run home run and starter Im Gi-yeong held China to a run over 6 1/3 innings, as South Korea prevailed 10-1 in its last super round game at GBK Baseball Field.
Son said the team were treating the final as a fresh start.
BC-Asian Games Roundup, 519Son's last shot for military exemption at Asian GamesAP Photo LJM104, LJM106, LJM105, XDA116, XDA112, XDA109, XVT105, XMB, XVT108, XTS107Eds: With AP Photos.
After the game, Park was philosophical.
China's men's basketball team secured a ticket to the Asian Games final after beating Chinese Taipei in the semifinals on Thursday.
Japan's Daizen Maeda, left, fights for the ball against United Arab Emirates's Salem Alsharji, center, and Mohammed Almesmari, right, during their men's semifinal soccer match at the 18th Asian Games in Bogor, West Java, Indonesia, Wednesday, Aug. 29, 2018.