Despite struggling throughout the match, Jurgen Klinsmann’s side produced a dramatic injury-time comeback as substitute Cho Gue-sung equalized in the final 10 added minutes to force the game into extra time.
Roberto Mancini’s Saudi side fought back bravely to hold on to a narrow one-goal lead secured by Abdullah Radif’s superb finish just 50 seconds into the second half.
Heung-min Son took the penalty for South Korea as the Tottenham man stepped up first to take his spot-kick.
But credit must go to Jo Hyeon-woo, who produced two fantastic saves to essentially seal his nation’s shootout victory and ensure they stay in the tournament. After back-to-back stops, Hwang came through and, despite immense pressure, smashed the penalty into the top right corner.
South Korea’s prize is a quarter-final against Australia on February 2.