How old were they?

Sung-yueng Ki

MF · Born January 24, 1989

Age in each playoff game

1. 2010 Group stage (June 12, 2010), South Korea vs Greece 2–0: 21 years, 139 days
2. 2010 Group stage (June 17, 2010), South Korea vs Argentina 1–4: 21 years, 144 days
3. 2010 Group stage (June 22, 2010), South Korea vs Nigeria 2–2: 21 years, 149 days
4. 2010 Round of 16 (June 26, 2010), South Korea vs Uruguay 1–2: 21 years, 153 days
5. 2014 Group stage (June 17, 2014), South Korea vs Russia 1–1: 25 years, 144 days
6. 2014 Group stage (June 22, 2014), South Korea vs Algeria 2–4: 25 years, 149 days
7. 2014 Group stage (June 26, 2014), South Korea vs Belgium 0–1: 25 years, 153 days
8. 2018 Group stage (June 18, 2018), South Korea vs Sweden 0–1: 29 years, 145 days
9. 2018 Group stage (June 23, 2018), South Korea vs Mexico 1–2: 29 years, 150 days

Age in each season

1. 2010 (South Korea): 21 years, 138 days to 21 years, 168 days
2. 2014 (South Korea): 25 years, 139 days to 25 years, 170 days
3. 2018 (South Korea): 29 years, 141 days to 29 years, 172 days