Lee Seungwoo (front) of South Korea competes for a header during the 2018 FIFA World Cup Group F match between South Korea and Mexico in Rostov-on-Don, Russia, June 23, 2018. Mexico won 2-1. (Xinhua/Chen Yichen)

Hwang Heechan (L) of South Korea handles the ball during the 2018 FIFA World Cup Group F match between South Korea and Mexico in Rostov-on-Don, Russia, June 23, 2018. Mexico won 2-1. (Xinhua/Chen Yichen)

Javier Hernandez of Mexico greets the audience after the 2018 FIFA World Cup Group F match between South Korea and Mexico in Rostov-on-Don, Russia, June 23, 2018. Mexico won 2-1. (Xinhua/Li Ga)

Kim Minwoo (R) of South Korea vies with Miguel Layun of Mexico during the 2018 FIFA World Cup Group F match between South Korea and Mexico in Rostov-on-Don, Russia, June 23, 2018. (Xinhua/Chen Yichen)

Moon Seonmin (R) of South Korea vies with Hector Moreno of Mexico during the 2018 FIFA World Cup Group F match between South Korea and Mexico in Rostov-on-Don, Russia, June 23, 2018. (Xinhua/Chen Yichen)

Kim Younggwon (L) of South Korea vies with Javier Hernandez of Mexico during the 2018 FIFA World Cup Group F match between South Korea and Mexico in Rostov-on-Don, Russia, June 23, 2018. Mexico won 2-1. (Xinhua/Chen Yichen)

Players of South Korea react after the 2018 FIFA World Cup Group F match between South Korea and Mexico in Rostov-on-Don, Russia, June 23, 2018. Mexico won 2-1. (Xinhua/Chen Yichen)

Rafael Marquez (R) of Mexico talks with Lee Jaesung of South Korea after the 2018 FIFA World Cup Group F match between South Korea and Mexico in Rostov-on-Don, Russia, June 23, 2018. Mexico won 2-1. (Xinhua/Chen Yichen)

Carlos Salcedo (L) of Mexico reacts with Hwang Heechan of South Korea after the 2018 FIFA World Cup Group F match between South Korea and Mexico in Rostov-on-Don, Russia, June 23, 2018. Mexico won 2-1. (Xinhua/Chen Yichen)

Javier Hernandez of Mexico shoots to score during the 2018 FIFA World Cup Group F match between South Korea and Mexico in Rostov-on-Don, Russia, June 23, 2018. (Xinhua/Li Ga)